I see what you are saying, and as you know I respect your opinion but my experiences with this are that its not the toilets movement that causes the seal to fail but rather the flow of the discharge. I have encountered this on a few occasions where the gnereal handyman on a commercial job has replaced a foam ring with a wax one ( for reasons never quite clear ) and have found that the lower side of the wax has worn away when I removed the toilet. the upper half was unnafected. after only a month and a half one toilet was leaking badly andother only slightly, and upon removal of the third it was close to becomeing a leak.... these WERE all wall mount toilets mind you.
these are my experiences and the reason I would only install foam on a reaar discharge, but you have had other experiences, and likely more experience So I'll not doubt your knowledge on this.
I would be curious if the OP does go the Wax route to hear a progress report a few months later.
rear exhaust toilet - changing wax
Linear Mode
