chemie

Do NOT use bolts for the wings. There is a [link=http://www.rcuniverse.com/forum/fb.asp?m=8179620]thread [/link] where someone who did this had a massive failure and the guy from SIG who designed the plane came on and gave a great explanation on how it was designed and basically said that you should never bolt. Rubber bands or tie wraps are sufficient.

In terms of fuel tank hatch, the instructions specifically say not to (weakens structure). For me, I used a 10oz tank and just had to dremel some material from the former closest to the open bay area and I dropped the tank floor down to some existing cut-outs. I dry fit everything and made sure the tank would come out. I did not even have to cut away any of the wing tube support (although this should not hurt anything if you do). I have tape on the tank so I can pull it back, rotate, and then remove. Access has not been an issue. See [link=http://www.rcuniverse.com/forum/m_8395332/anchors_8395332/mpage_1/key_/anchor/tm.htm#8395332]here[/link] with final solution detailed [link=http://www.rcuniverse.com/forum/fb.asp?m=8483731]on this post.[/link]

If I built again, I would add the CB on the elevators as the inverted flat spin is anything but flat; more like 45 degress off and it is due to the lack of elevator. However, I would also shift the exit slot for the control rod for the elevator. I can not use the upper most hole in the control horn because it is too severe a bend on the control rod...moving that slot up 1/8-1/4" would help there.

I did not sheet the TD but you have the right idea. Shave 1/16" off the stringers and then sheet with 1/16" sheeting. I would make a paper template to get the shape right. You might want to put some short strips along the base of the fuse to have some meat behind the balsa where it mates to the fuse (the first stringer is up a bit and to get the bend you might need to pin/glue at the base)