Hey Guys,im putting in a 1976 SRX rear skid (almost) all aluminum suspension for my race sled (30ibs so far for skid), should I put any idler wheels on it? if so where? i now only have three rear 7.5" wheels (was only 2, i put one centered) and that's it. I will be racing on Packed snow by a trail groomer for 660 feet, NO ICE! Wondered if i should leave them all off or put lots on there? any ideas??????? Also should I drill any holes in the slides, they are expensive Race ones bought at royal distributing