I've been lashing my tiller for years, in the same way that you've been doing it, and fortunately I haven't had a problem as of yet. The only difference is, I have a tip up rudder blade. If the water at low tide was deeper, I'd wouldn't bother lifting my rudder blade each time I put her up for the night. I always make sure that the centerboard is always in the up position when I leave her. I've been using a couple of lengths of 5/16" braid ropes with a Bowline at each end, to attach to each of my two stern cleats, and I then center the tiller and take a "round turn" around the tiller in front of the metal stud that is used to attach my autopilot. I then tie two or more "half hitches" on the ropes. I make sure that these ropes are tight so that there is no play in my rudder. Of course, these ropes can dig into a tiller if you don't have chafe protection, so I took a square piece of leather and made a 1/4" hole in the center to fit over the tiller pilot stud. Then I cut the leather to fit so that I could sew it in place under the tiller. The only possible way that pintles and gudgeons could break and cause you to lose a rudder during a severe storm, if it was tied up properly, and I'm sure that you had it tied properly; is that your rudder hit bottom. Even if you had a couple of foot clearance under your rudder at a mean low tide on a good day, just the fierce wave action alone is going to cause your boat to dip up and down, and your rudder will hit bottom, and if the storm occurred during a Spring tide, your rudder is really going to ground out. We really don't know what's under our boats unless we take the time on a hot summer's day and dive down to take a look. I did that a few times in our club's mooring field and found two old steam radiators, a train wheel, and a 1300 lbs mooring block,--all in water that was no more than chest high. My only answer to you is; keep on doing what you're doing, but if you can get a deeper mooring, go for it. Taking your rudder off each time you came in, would be a pain in the butt, and it's not too feasible for a boat that size;-- a day sailer, yes,-- but not for a 26, or even a 222 like mine.