Here's the retracting motor mount. You can see it's mounted with only four bolts. The lower pair are in the uppermost of  the three lower positions. I think the factory uses the same hole pattern for both the fixed and retractable motor mounts.  You could email Gerry Hutchins at Compac to confirm that. I decided to fill the lower pair of factory holes, and drill new  lower holes in the bottom position of the bracket, giving me the greatest spread possible.  Here's PC#29 with the new ladder and motor bracket. This is an earlier pic before I scrapped the plastic goal posts in favor  of side bunks.  73