Thanks everyone on the advice. I'm using the Robart's incidence meter. I have their standard rod and extended rod. I notice when I try it on the left stab that I must have the anti-rotation pin hole a little too big and there is movement in the needle that is why I think I need to know the datum line.

Why is a crutch needed from the tail reinforcement former to the TE of the wing?

I wasn't planning on putting in wing adjusters. I've seen them on Central Hobbies. Is there a link to the Gator devices? I can still mod the wing to accept these I suppose. I can set the incidence any time during the build. I may hold up on doing it until last. I've read some use these adjusters and others don't. I doubt the owner will be flying this in any competitions

I just read the comments of the rudder. I thought it looked a little off, now its confirmed. So I have to split the tail at the top and rejoin? Do I use CA to tack it then some epoxy underneath?

Thanks

Kelvin