Oh okay neat, that'll put me in the right ball park.
Yeah, I am beginning to realize that's probably the best way forward. I'll just take it slow and make small adjustments to keep the alignment happy. I also realized that, with my current configuration, tightening the bolts enough could actually begin to warp the sprocket itself.
I suppose I'll make a run by Harbor Freight and pick up one of those ultra cheap rotary tools. Not good quality, but I imagine I'll hardly ever use it anyway, lol. That'll be nice too because I need to grind the corner of the left pedal crank off as it currently runs into the exhaust. I actually sat down with a multitool file yesterday and started trying to grind off that corner, then realized how utterly long that would take.