I went from 6 drgree offset to full right helical, I shoot a MZE so clearance is no problem, I was dead on out to 35yards with straight and could hit a softball at 45-60. with helical I am dead on out to 45-50 my groups are smaller all the way out. as with the left or right don`t worry about it unless U are using blades that are offset to the shaft. my split-fires are right helical blades so my fletching is right so they do not compete with each other in steering

Evan
Archery Accessories
301-872-0110