I am not familiar with Mech Des of Process Systems. I am guessing that the MRS is some form of long guide. If the effective points of action for lateral loads are a large distance apart, the lateral force and hence stiction / friction will be low and vice versa. I'd be more interested in the vice versa.
Even with very small clearances, there will be a finite rotation and give before load is taken up.

My money is on Superpiper's horse at least until I've seen the MRS on the paddock.