cweeks,
I single cam doesn' t go out of time. What some refer to as " timing" is actually cam position, and it is what the two holes in the cams are used for. As far as tiller, I' ve always done what Mathews has suggested, and just bottomed out the limb bolts, then backed out equal turns. Perhaps it won' t measure in the tradition method of measuring tiller, but this might be something inherent to the bow' s design.
Good Luck,
Charlie