I have an opportunity to pick up a couple 13" RR wheels (one Duralite, one Real) for a decent price for backups, but they have 6 pin centers. I run a 1 3/4" rear axle/4 pin hubs. I have some spare 4 pin centers for Weld/Sanders but the bolt pattern doesn't look like it matches up. Does anyone have 4 pin or 27 spine centers for sale, or have more information on whether the Sanders will work? Thanks Greg