Yeah, I just had the same leak, SURPRISE.
For a first time it was not an easy job, but then again its had to stuff 260 lbs & 61 years old into a small place & then try to work with your hands.
Once done, same ol stuff, another RV product with failure built into it. As hard as that little valve is to get to if replacement is needed, why on earth is it not made with a bit better quality.
Half a ball valve inside & its plastic to boot, its not going to last.
It would make more sense if that is how its going to be, at least supply a pan of some sort to go under the toilet, so if it does leak the pan would have a drain hole & tube to flow the leak outside the coach instead of all over the floor.
Neil