Starting to figure out the Gates catalog and seems like LL2MR06 is the correct belt. I accidentally ordered the 4mm version.
Update: McMaster-Carr has them but not in a long enough section. So I just ordered a 1000mm section of the 6mm GT2 to test and another of the 9mm wide. Figure if the 9mm wide performs a lot better, it probably wouldn’t be too crazy to modify the machine to make it fit.
