Hi Cris,Ive built two of the super 60s,three and a four channel,i would advise using quarter spruce instead of balsa for the spars front upper and lower on the wing section,ive read on some other sites that this reinforces the wing,i hope it does,because im building another wing now as mine snapped in mid air,lol,wish id of seen that site before i built the four channel version,im also not banding the wings,i am now going to have the wing fixed with two plastic bolts on the cetre section of the trailing edge,and using half inch hardwood dowel coming out of the underside of the leading edge centre section,plenty of people tend to modify this model,i love building,so its good practice,all the best with your build.