The beman classics and bone collecter specifically.
Not intending to seem sarcastic but you can more helical than you need. I use a Bitzenberger and set a shaft in the jig then place the clamp on the shaft, set the helical and file the aluminum clamp down to where it contacts the shaft evenly along the clamp's contact length. Take your time and "eyeball" often, it can be done in 15 or 20 minutes. I use a 10" half round bastard file and it helps to shine a light behind the clamp when you place it on the shaft occasionally to check your progress as you file it down.
I shoot the Beman MFX Classics and I get plenty of helical in my fletching job and I use fletch tape too with a Jo-Jan.
The longer the fletch the more rotation of helical you will get.as long as the fletching jig has even spaced notches the fletch will be even and if the clamp permitted go completely around the shaft. I had some Radial X weaves 300 and had a sick amount of helical on them.
I shoot 4 inch right wing and get plenty of helical on an axis 500.
Plenty of rw helical on Easton Axis shafts with Bearpaw jig to stabilize any broadheads I've tried.
Theoretically speaking you can get just as much helical with a small diameter carbon as you can a larger diameter aluminum or woodie. The only thing that will be smaller on a carbon is the spacing in between each feather. I would be careful putting too much helical on them or they will slow down much faster getting a flu flu arrow effect.
Don't mean to get too technical, but as others have said you can more than enough helical to satisfy your needs on carbon.
I don't have any problems up to and including 5" feathers.
I have always set my jigs up so the quil center's the shaft's diameter in order to get the best quil/shaft glue up. This also (at least with my jigs) produces the perfect helical...enough without being too much.
I dont shoot helix on my Beman MFX. I just have offset fletch, and they shoot fine.
I get plenty of helical with my Bitz and my Jojan on my Axis/MFX.