I ran into the same issue (10mm limited with 9mm barrel)and have tried lighter springs but I still had the same problem. I never got around to figuring it out
I cant imagine it would hit the frame any more than a hunter hammer. You may be better served with a limited hammer take off. #2 trigger is easily obtained that way and would be way cheaper.
I dont think eaa will send a replacement safety.The safety on a limited has always had funky cast marks but it doesnt really effect function.
The slide hanging over can be remedied by filing the rear of the locking lug of the barrel
I did the same to convert my limited custom but the barrel was $140 from EAA. That was two years ago, I think they want $290 for a limited barrel these days O_O