I am building a foam core wing for a 95" warbird. I already glued the retract mounts. The retracts and wheels are quite large, my question is, should I cut out the wheel wells and sheet afterwards or should I sheet first and open up the wells later? Second question: Wing consists of 3 sections and plugging the outer wings with carbon tube (12 inches, per side, so goes into the 6 inch). I have build a half rib to house the sleeve. So question now is, what should I do with the spar? Should I build a spar to full length and depth of the sections or partial. Wing will be sheeted with 2mm balsa. Flying weight is 12-14 kgs thats about 30lbs.