Help with Guitar Filter

I'm in the process of creating a guitar filter (w/ FF1); so far I have the neck, with frets (I cheated a bit, they aren't spaced properly) and some oddly placed strings.
I am completely stuck on how to create the body , I was thinking using a perlin noise as the bevel width of tiles and running that through a threshold, but that creates too much variation. Here's the file, if anyone wants to help me solve this or improve what's there already (which is only half the height map), I would be much obliged.
The reference I'm using is a Fender stratocaster.

Guitar.ffxml

this might help as well guitar [with no offense to the author ] doesn't quite work, but it might give you ideas how to get the shape going for the body

Carl and CF&M, thanks for your help , I did use uberzev's shape to curve, and it's probably the best way, I just can't quite get it right.
Carl, FilterForge isn't letting me download anything at the moment, so I'll have to check the filter out later.

Nice stuff Walpen!
Are you starting the virtual rock band The FilterForgers?

looking good Walpen

Very Walpen..