I noticed the the curb side front slide motor was getting loose, enough so that I was worried about it possible breaking. The lag bolts holding the motor bracket had actually pulled the subfloor loose due to the high stresses in this design. I did manufacture a support for the bracket but it didn’t hold as well as I liked. So I had it checked at NIRVC and they built a new metal frame so the motor will never get loose again.
Only problem was this repair was not covered by warranty as it hadn’t actually broken. So I had to pay $1,700 for the repair, however, that’s better than possibly actually breaking somewhere on the road when it would be most inconvenient.
NIRVC fabricated a bracket (not visible) that is welded to the two stringers