I DID get mine started but it wouldn't seat properly. This was after I took the edge off the bearing on my green wheel (a mild abrasive wheel that does magic things) and froze it.

I then went to opening up the crank ID with the tootsie roll, which worked. As you surmised, the issue with this method is that you're assuming that you kept the crank hole round and concentric. My guess is that it'll be close enough but it's unlikely to be ideal.

But if I had it to do over again it would be off to the bearing store for a bearing with the smaller ID - I simply didn't think of that at the time. This actually handles the issue properly and will for sure be cheaper than having something machined, though that will probably work fine, too.

You can also order the bearing online but I don't know how long it would take to get it.

EDIT:

A little on-line research on the 6202-2RSJ bearing. It's 15mm. ID, 35mm. OD and 11mm. wide, double sealed. I didn't search for one that was 34mm OD but it's likely that there's one out there. Your bearing house ought to be able to find one for you.

Dan