Kinda wondered if someone had same issue as mine. I assembled it yesterday and found that bottom wheel has to be shimmed for 6mm. Is it Ok or too much? I have spoken with Grizzly Technical support today. Althoung he said everything is Ok. I think he was not 100% sure. Also he adviced me that I might need to replace 3/4 bolt by 1'' one since I need to shim such distance.