Issue with preparing rim for gluing the guitar top

[tippie53]

if you have a piece of plywood that you can lay across the upper part of the top and press down at the neck block , you should see a rise , the gap at the tail should be about 3/8 inch. That will be in the ball park

[Zen]

if you have a piece of plywood that you can lay across the upper part of the top and press down at the neck block , you should see a rise , the gap at the tail should be about 3/8 inch. That will be in the ball park

Thanks John, Its the back I'm worried about actually--when I turn the body over with the top facing down and lay a piece of ply across the neck block area I find that the end block is down by 3/8th below the sides which means that if I glue it this way then the back will not be sitting on the tail end at all. I think its the same with the neck block on the back--its down as well so wont be touching the back

If I shim both of them up then how do I know if my angle is ok on the back ?

Thanks

[Darryl Young]

Zen, I didn't read this whole thread but I read your last post. So I may be off-base with these comments.

If you used a radius dish or radiused sanding stick on the back of your rims, it's normal for the waist portion to be higher than the neck or tail block. The back is bent into a curve (neck to tail) to follow this contour. The back braces are usually curved at the same radius before gluing to the back and that curves the back side to side. In the end, the back forms a radiused, sphere shape in all directions.