My 2 cents I'm no expert by any means, I find if I go with banded benches for more that 3 weeks in a row my elbows and shoulders start to get beat up. When I do banded bench and use skull crushers that I bring down to my nose or lower on my pretty face it causes more soreness. When I do a wave of banded speed benches I try to pick more elbow friendly movements. I agree with Ryano if your CG benches are bringing your elbows below the bench don't do them full range on speed days for awhile and see if your elbows improve. When I do CG as a ME movement or as an accessory I never come down to the chest always 1 or 2 board.
Fear is the Mother of defeat.