Josh I haven't waded in here yet, but I would not want to be responsible for someone getting seriously hurt or even killed by a grinding wheel exploding, just to possible save a few dollars.
Rather than going the right way and have the proper flanges for the grinder to keep the wheel at right angles to the arbor, and then to round the wheel with a dresser, now there's this idea that a tight fitting bushing is what will do the job, and until someone gets a bushing in there
too tight and have the wheel split and explode it might even do the trick.
So a heads up, I would not recommend getting a tight fitting bushing in there, you might do yourself a disfavor and create a accident waiting to happen
This is not directed to anyone in particular, but just as a reminder that a grinder is not a harmless tool, and to treat it as such, I've seen what damage an exploding wheel did do, and that's not funny