Its simply a different game running box over no box. The BIGGEST thing you will find if you decide to make the switch is that the MOV in Box racing is usually much much tighter than in no box. I have done both and the MOV numbers in box are simply much closer on an average basis. Also you will generally find faster cars in box than no box, which adds another variable especially if you are one of the faster no box guys. You wont win a lot of rounds in box racing being "sloppy" on the tree and not keeping it close up top. Just as when you ad a stop and try running .90 stuff the margins just get that much closer on an average basis. You have to be good at both ends to turn on win lights.