ORIGINAL: TFOX
When using a fallaway,the spine does become a little more crucial for good tears in paper.
The prong rest are more forgiving without a doubt,if you like the Bodoodle or a standard prong rest and can get fletching clearance with helicals,I say go for it.
I had no problems getting clearance out of prong rests. That's what foot powder's for
But I did not know about the spine issue, thanks for the info. I learned something today.