Acoustic Guitar Construction

This time I thought it was a good idea to try out an extended neckblock. With a massive part from block to upper face brace.
All went well up to the 28" sanding of the rims and blocks. I forgot that the part where the fingerboard is attached to the top should be flat. The neckblock and extension kept the concave form of the sanding. I glue the top to it and guess what? The area stay curved like my bold head. Ugggely! Look and shiver:



So what to do?
-Sanding it flat? The top would be 1mm/0.04" thick left. Hmm, not much for a stressed area.
-Taking the top off? Grrr, don't like that either. Lots of work.
-Chisel the extension off? I don't have the back on yet. So this one is is the most appealing option to me now.

Other visions?
Herman

I'll let those with more experience chime in on this. I think I would bite the bullet and remove the top.

I would try to chisel and plane the extension off and see what it is like after that. You can always remove the top later if it does not work out.

That sure does illustrate one of the pit falls of using that contour dish method which I explain in this article:

http://www.kennethmichaelguitars.com/neckangle.html

I believe if you are comfortable with your neck set process I'd give John's idea a try. The fit can be tweaked pretty easy using a fret-board simulator like the ones supplied in the KMG kits. It will be a little more of a challenge if you are using the real FB and even more difficult if the FB is already attached to the neck.

Don't waste precious time. I did go for the chiseling-off option. Took me 10 minutes. The extension came off quite well. one little chipping. I'll cover the area with a little patch. Sideeffect: the guitar will be a little lighter.
This is how it looked immediate after the surgery. Almost flat. Probably it will get even better after a little settling.
Thanks boys for the support

Much better Herman, good thing you had access to that extension. Another good reason to glue the top on first right!

Kevin

Nice save Herman. Beats taking the top off!