rgranger, not for nothing but do you know why my keel trunk is diffrent from yours?
i feel pretty stupid but is that the stop bolt right directly above the pivot bolt?
I noticed in one of your earlier photos, that your V-birth looks like it has been rebuilt. It looks like yours is extended aft about a foot. A nice improvement for sleeping space... the V-birth on these boats only serves short people... but it does take away a convenient place for the port-o-potty.
A guy named Sumner on this forum has done extensive renovations to the Mac V22's bigger sister (26C). Do a search for his name and you will get a lot of good stuff. One of his mods was to use a double-dooty bag and a PVC bucket w/toilet seat instead of a traditional potty. And he was able to place it under the quarter berth. Nice mod. You could do the same with yours. You will notice in later pics of my boat that I replaced the bulkhead at the keel trunk. You should do the same. It ads lateral stiffness to the boat. It also gives you a place to hang stuff and you could use the forward face of the bulkhead as a hanging locker.
What you are calling the "stop" bolt is actually a lock down bolt. I think you had duct tape over it in earlier pics. You want to find a SS bolt that fits in there and (yes) it can be used as a stop but what you really want is to be able to insert it through your keel fully extended. The idea is that if you ever suffer a hard knock down, the keel wont swing back up into the trunk and crash through... (that would be bad). Some people on here have suggested using a nylon bolt (like the ones you use to hold down your toilet to the floor). I'm still out on that one.. but the idea is that it would be strong enough to keep the keel from crashing during a knockdown but soft enough to break if you hit the bottom .... thus minimizing damage to the keel trunk. If you are going out in Big water... and might get caught in a late afternoon T-storm... you want to lock the keel down. A day sail in shoal water you may want to use that bolt as a stop rather than lock it down.
Another cool thing about the Mac 22 is you can adjust the point of lateral resistance by moving the keel up and down... If you feel a lot of weather helm, then raise the keel a bit and that helps balance the helm. Converse is also true.