Steve, I've kept the thickness the same as before, so overall, it's still 1/4"
In hindsight, I probably should have gone for a 3/8" build up stab, trading the extra thickness for torsional ridigity. Extreme fibres and all that jazz.
It's a IVVVVI style truss, with a big centre brace for mounting.
Douglas, no it's a full fuse Sig Super Chipmunk.
Well when I say it's a sig, it's getting less and less like the box every minute!