A string suppressor will ABSOLUTELY stop arm/string contact...

Rev, you shoot targets right? Probably are well experienced or at least know about back tension and a good explosive shot...

Well, even with my pro-elite with an 8 5/8" bh when the shot would break, the string oscilation(back and forth/side to side) would rub my arm. Im not talking about slap, but rub after it passes brace.

If you would question my form, I'm sure TFOX can attest for me a thousand times that I shoot too short of a draw length, and my form/execution is pretty damn good

Not every bow will hit often, but ones with a lot of feed back and forwards jump(mainly target rigs) will hit the arm after the shot. I've had 2 xforce 6's(original hf, and an 09 GX both with 6"bh), as well as a 5.5" brace height omen and none ever hit my arm, but with a large jacket would get close to coming in between the suppressor and string(eventually sold the omen due to this when it got cold after i killed 2 early season deer with it)

Suppressors sometimes make a good difference in noise and speed, but other bows i've set up have had little difference. The HF6 xforce made a lot of difference in both hand shock, and noise, and also picked up a little over 1fps, while my bowtech guardian had no change in noise or hand shock...

different results for different setups....