Hey, I thought after doing the "test" guitar I could move on, and whilst I did get a better understanding in Moi from you guys, I am about to attempt this and struggling to see how I can create it. I've tried several methods in this thread, but I'm getting bad results. Mostly these "arch" shapes, along with the filleting of it.

I've included my shapes, along with a reference. It's seriously driving me crazy, as I personally have this guitar and want to recreate it in 3d.