[slijin]

Originally Posted by Mr V

No if the rail is slick the Frisbee will spin more and it's exit speed is lower. The slick rail allows the Frisbee to spin without moving down the track while the grippy rail causes it to advance at 1/2 the tangential speed of the shooter wheel (assuming no slip between the Frisbee and wheel). This is based not only on my gut feeling but our prototyping.

Did your prototyping consider compression? When we say "grippy," we're really just referring to the friction between the disc and the rail.