Well, not overly sure just how thin to make stuff, but at least this is now ringing out with sub-harmonics and definite bass /treble tap notes from the upper and lower halves respectively. Then the linings were relieved where the main cross braces will go that will lock the main strength-critical braces to the sides:
Quick check fit, looking for gaps:
And the old adage that you can never have too many clamps
And tidied up:
Next jobs will be fitting a bridge plate, doing the first rough-fit of the neck angle and pondering on whether to add a side sound hole or not