Close

Thompson Top Crack Corrector

4.5
  • 6 Reviews
  • Write a review
Thompson Top Crack Corrector Thompson Top Crack Corrector

Thompson Top Crack Corrector

Item # 4610
In stock, ready to ship!

$125.00

+
Thompson Top Crack Corrector Blank Cauls, set of 3

Blank Cauls, set of 3

Item # 4631
In stock, ready to ship!

$60.00

+
 
Total:
Qty:
Scroll to Top

Thompson Top Crack Corrector

About This Item

Repair system for cracked guitar tops
A matched set of clear Lexan cauls loaded with magnets. The interior caul holds a featherweight wooden cleat while the exterior caul pulls it into place over the crack. The magnets hold everything together while you apply clamps.

Repair delicate guitar tops the T.J. Thompson way
T.J. Thompson is famous for restoring the most valuable vintage Martins. To get his exacting results, T.J. makes himself some great tools. We're glad that he shares them with us.

T.J.'s patching cleats are very thin and light, with the grain oriented to make them strong. Spruce cleats are provided in the kit; extra cleats are available in spruce, rosewood and mahogany.

The exterior caul has a scribed centerline to align over the crack. Since the cauls are clear Lexan, it's easy to see this alignment.

The interior cauls are notched to fit over over the advanced X-braces on pre-war Martins. We include two blank cauls so you can cut notches to fit other configurations (additional cauls available). Magnets hold the interior/exterior cauls together through the guitar top.

The interior caul is grooved to hold the glued patching cleat. With the magnets holding everything in place, you have both hands free to apply soundhole clamps.

    Thompson Top Crack Corrector includes:
  • 1 exterior caul with magnets
  • 3 notched interior cauls with magnets
  • 2 blank interior cauls: one with inset magnets and one without
  • 3 extra magnets
  • 5 spruce cleats

Blank Cauls are a set of 3 blank interior cauls with inset magnets. Make your own custom cauls to fit your needs.


Customer Reviews

  • Excellent
  • Good
  • Average
  • Fair
  • Poor
Write a review
4.5
  • 4.33 average rating from 6 reviews
Sort by
3.0

Not enough "bang for the buck"

By

Verified Buyer


Not sure which model tone bars these are supposed to fit over , but it doesn't correspond to the bracing of the herringbone guitar plan offered here at stew-mac. I'm sure I'll use them someday, but the first fix on a small body ,required shorter pieces where the magnets were not so far apart. I fashioned my own pieces out of maple with a 1"-5/8" radius groove on the top to hold the spruce cleat ,and purchased the 1/4"magnets from another supplier that fit snugly in 1/4" drilled holes.Too easy!!! And with transfer tape and teflon fret dam it worked like a charm.Cheap.

5.0

Absolutely brilliant design

By

Verified Buyer


This is one of those things that you say to "yourself "now why didn't I think of this". I've already fixed three tops with it and this really is THE only way to do this type of repair. This is a God send for those of us in the middle of "cracked top season" ~ Pauls Guitar Repair, Ottawa, Canada

5.0

great idea !

By

Verified Buyer


I took the system to repair 2 Taylor guitars and I am very happy with the results. Easy, accuracy and secure work with professional look!

5.0

perfect tool for the job

By


I've used this system for numerous top crack repairs with excellent results. As with any tool there is a learning curve but I found the tool to be easy to use effectively. I like the fact that the system clamps the crack flat and installs the reinforcement strip in one operation, which is an improvement over a two step process of gluing the crack and then installing diamond or disk cleats. Saves time, which is important in a busy repair shop. The reinforcement being one continuous strip is also an improvement to individual cleats. The magnetic feature assures proper and easy placement of the reinforcement and caul. The blank caul that is supplied allow you to cut for bracing arrangements that the pre-cut cauls won't accommodate. In my opinion the price is reasonable, as it would cost any craftsman $125 worth of his time to create the same set up and put it into use. This is a great tool for the pro or hobbyist that will improve your results.

3.0

Excellent tool and idea but

By

Verified Buyer


I had to reduce from five stars to three. My first repair was on a Washburn Jumbo test guitar. The jigs had to be modified immediately for the repair below the bridge since none shipped that matched a Jumbo. No worries though since Dan's video offered that solution. On the two cracks near the pick guard and the neck, the short stock cut off for the lower repair required drill press time and magnets to make it functional, along with the cutoff magnet.

I lowered the rating from a five to a three because not shipping this tool with extra magnets and stock seems insufficient for its use. The extra magnets need to be both long and short. I tried a long one on the top jig and wound up with the slightest dimple since the clamp was positioned right on top of the magnet. It might be 1/64 too long but a dimple none the less. Also make sure you scrape any drill press punch out off the plastic or you may mar the top as well.

There has to be sufficient margin to throw in extra plastic stock and magnets at $125. If not, my next jig will be like this but homegrown.

5.0

Diamonds are not forever!

By


Ok, full disclosure. I have been using the Thompson Crack corrector for several years now ever since TJ sent me a prototype. Prior to this new system I used the traditional diamond cleats working blindly through the soundhole hoping the cleat straddled the crack line before the hide glue gelled.
The genius of this new design is that as the product name implies an older crack that has flared upward or is fractured can be realigned flush by means of a continuous petite cleat, quickly and accurately.
Dan Erlewine’s instructional video demonstrates some common cleating techniques and with the benefit of a few years in action I would add that the blank cradle supplied with the kit is vital. I have cut those blanks into small sections, drilled 1/4” holes and installed additional magnets creating cradles for small crack repairs.
I marked the precut cradles with a letter and made a chart showing which cradle works for a Martin D, or size 0 for quick selection of the right one. Also when cutting a blank cradle for a different bracing pattern it is marked and noted on the chart. I would encourage StewMac to offer the blank cradles as an independent item for purchase.
I was relieved to see Stew-Mac is offering this tool and most importantly the replacement cleats because TJ’s a busy gent and I always had a touch of guilt interrupting his workday ordering the cleats from him directly.



StewMac PDF Catalog, page 25 See Thompson Top Crack Corrector
on page 25 of our StewMac Digital Catalog