I'm finally starting on my 48" build. This will take some significant restraint on my part to build as designed... LIGHT.
The plan is to use no spackle or thinned goop at all on the wing and fuse. Covering will be packing tape and a few pieces of JW strapping tape.

Specs:
JW48UL kit from jwglider.com
Depron fin
Standard single spar .240" carbon with thin walled aluminum joiner.
MKS 6100 servos
Lemon rec'r (gyro optional)
4 cell AAA Eneloop battery in nose.

I became inspired when Aaron came up to Weldon and blew us away with his "Whacrobatics".

JW48 "Whackrobatics" (1 min 13 sec)