David,

I only tack my sheets in 3 spots and the glue bonds them well and I've had no issues. I have done both methods of epoxy (since I buy it in 5 gallon containers and have plenty) and GG and I personally prefer the GG. I have wanted to strengthen the elevators and used carbon veil so I used epoxy in that case but it's rare, I just find poly glues easier to work with...but that's my preference so definitely try the different methods and see which one works for you.

I will say occasionally a small amount of glue seeps out but I've had that issue with epoxy too. Either case it's not really common. Tacking the skin with CA does require sanding a bit before gluing on so I'll try the tape method. I saw someone putting it on the inside and using sanding sealer...not sure if sanding sealer makes it that much lighter and was wondering if anyone put the tape on the outside of the skin.

Whatever method is used, make sure you match the thicknesses because most balsa sheets are not uniform in thickness. If it's off a bit make sure to sand it before you glue it on the cores. You don't want to sand it after it's on the wing. However, I've had to do some light sanding in some spots that bled through...it happens, just be careful.

Tim