I also found out that my stanchion plates are not placed the same on each side. Neither are my pad eyes for the shrouds. I think they said "That looks good" when they installed them. it also means my rigging is different in length from Port to Starboard. Not by a lot, but enough to almost have no more adjustment on my starboard side turnbuckle to make sure my mast is plumb.
Here is that U Tube cut of the mast raising rig on a Catalina 22. He uses chocks in the handholds and a gooseneck fitting in the mast groove that rides up and down to accommodate the difference in the hinge plane. Good idea. I'm going to try it.
YouTube - Mast Stepping Catalina 22 (1st Take)