how do you guys do it? mine need to be rolled imo
well, you don't need the whole wheel well to be rolled, just the part where the tire would make contact with the fender.. and wheel/tires are round, so it would take care of any problem areas.I can't see that tool working all that great. Unless you hace a perfectly round top on the wheel opening and it is parallel to the wheel at every point along the arc.
I took my tire off and used a 2" swuare piece of wood and hit it with a 2lb hammer. Rolled it completley against the inner wheel well and I did not cut slits in it.