fencelake
70cc twin V2
Also, please make sure the wing tube is no too long (we have seen a few wing tubes and stab tubes that were up to 1/4" too long.
Add up the width of the fuse, plus the two wing sockets. It too long, is can easily be cut with a dremel.
Ah... I'll check that, because that could very well be what's going on. Thanks!!!