No , the threshold is the same . The only difference to my knowledge comes with starting the roll you gotta hit the first two notes before the third note , so for fast rolls you want to start out fast andor start early so you have room to hit the two notes before the third note crosses the strikeline . Once you hit those two notes , the threshold is in play and you can speed upslow down freely . Experiment with stuff like the Frankenstein outro yellow roll lane and you ' ll see what I mean . <| sep |> Not sure of any Canadian glass groups specifically myself , but I do know a small number of the people in these groups are in CAN and most sellers are willing to ship to up there of buyers cover fees . American Glass just means made in US and not on a factory line in China .