I have a TSC
4’ tiller and it runs great. We have heavy clay soil as well. I have it forward rotating but it can be reversed if desired. No offset but it covers my tracks and my wheels are set wide.
It goes 6-7” deep. I use a sub-soiler to loosen up 16-18” down as well. It is a great combo for initial garden prep. Long term I have a Broadfork for maintaining my gardens.