That may have been my post you read about the 733s actual size being different than marked. based on what others have said, I believe that it is an issue with the particular model of tire and the 'fault' of Shinko and nothing to do with Pinwall.
IMHO, if you find a deal on a set of Shinkos that others have verified fit the 750 OK, go for it, however, it seems the 733s will not fit.
......I'd rather wake up in the middle of nowhere then in any city on earth.
*2014 VN900 Custom (16,200 miles and counting)