Martin Jumbo Kit Back Braces

[tippie53]

what Maine said
think of it this way , when you make cabinets you joint an edge in a square straight plane , here we are working n compound shapes same principal

[tubegeek]

The pictured guitar is one of those and it was in perfect condition when it hit my daughter's repair shop (brooklynlutherie.com).

Is your daughter Mamie? I met Mamie when she worked at RetroFret (I'm a friend of Steve's.) Lovely lady with a serious licorice habit.

[ruby@magpage.com]

Yes she is - that was 2014 when she started her own business - 7 years now. She is doing great with Chloe, also from Retrofret.

Here she is playing my latest, a Martin 00 in Redwood and Maple with a Stauffer neck. FIrst a tune

https://www.youtube.com/watch?v=To7fHRS ... e=youtu.be

Then a great song by Gillian Welch

[ruby@magpage.com]

and here is the second one

https://www.youtube.com/watch?v=cXX70Rq ... e=youtu.be

The site woildn't let me post saying there was a max of 2 URL's when I had just 2????

[tippie53]

martin kits are made from off fall parts.
Martin does use different radii on the back braces for what reason I don't know but I find this difficult. remember that Martin is a production plant and they jigs they have are not out there for the public. That said 15 and 20 ft radius are acceptable to make back . I don't think it makes diddly on tone.
The braces that martin uses today were change in the 80's from the lower flatter back braces.
Be sure your glue joints are tight and it will be just fine.
The advice give on this post is acceptable and will give you a good result. In my early days I used index cards and used them as shims to match the curves. Lots of ways to do the same thing and that is what makes this hobby so enjoyable.