Done both ways, but my normal rib is pretty much nekkid. I don't much do baby ribs, and St Louis usually charges to cut down the spare rib. They make it up in the price per pound. Since I don't do competition, and I hate to lose those bones and skirt meat. I am normally doing spare ribs.
I have done the 3/2/1 method, its great, but it usually effects the bite. Its just my inexperience. I normally do the break over test and and I am very happy with the result.
BTW by circling the wagons, I can give a MES30 the ability to smoke 8 small or easily 4 large racks of ribs. Probably more. AND since the ribs are in tension, they tell you when they are ready.