I am flying my Giles at 5-1/4" from LE measured at the fuse. Mine flies awesome IMO. I did 4 flights with it today.

Actually, I was thinking about moving the CG a bit forward to 5" or 5-1/8". I really do not complain about my actual CG. I just want to feel the difference.

I really would not pass 5-1/4". I think it will be tail heavy. By the way, what's the RTFW of your Giles? Mine is 7.0 pounds, that's about 26.1 wingloading.