I had stock in mine, and now I have something like 2500 or 3000 stall because of the ultra bell situation I go into. Love the UltraBell, hate the cost of smaller than stock converters. Kid Rok hooked me up with one he had layin about. For slow technical crawlin, it kinda sucks, its very hard to slowly turn the tires or "ease" around since the rpms are higher . But the one thing Ive noticed and been doing technique wise is on ledges or climbs were I need that wheel speed I load it with my foot on the brake and floor it, it helps alot, its almost like having a clutch and dropping it.
Like I said, it wasnt by choice but out of neccasity and lack of options. I dont feel its a hinderance enough that Im going to change it. I wouldnt tell anyone thats the way to go, STOCK stall is the way to go IMO.