RE: laminating sheet tail surfaces.
Anytime I need a stab or fin that is 3/16 or 1/4, it's always laminated like Jim's post above. There is no reason that 1/32" sheeting could not be used over a 1/16" frame. I lay out the framework over the bottom sheet and attach with CA. When the top sheet is glued on, I use Poly-urethane. The framework get an almost dry film of PU and the top sheet is misted with a spritzer before being laid on. I use finished plywood plates on the top and bottom and weight with about 30 pounds for 24 hours.
For 3/16" thickness, all parts are 1/16". For 1/4", the framing is 1/8" with 1/16" sheeting.
If you keep the inner frame small, you get a light, stiff stab. The attached drawing is not too good, but you get the idea.
andrew