i just noticed at pba.com that the 3G brand bowling shoes( dynorooz ) will be pba approved this upcoming year. i also noticed that the bowling balls from 900 Global, lane #1, and lane masters/legends will be classified under the "grassroots" category-----that is they can be used in pba regional and senior tournaments and in the ptq portion of a pba tour stop. they can not be used in any other part of a denny's pba tour stop. i noticed that amf, elite, roto grip, and track are registered under the "all tour competition". would x-guy and/or newguy be so kind as to explain these classifications and their companies reasons for going the route they chose ?