I just adjusted the chain, with the inch or so slack per the manual, then when I took it off the stand and doubled check the slack, it was tight, with maybe a 1/2 inch slack max. I put it back on the stand, and rotated the rear tire. When you rotate the tire half way around, its tight, rotate it a half turn more and it has the 1 inch slack? Any ideas of what should I be looking for, or is this normal? Thanks for the help!