Micro-leaks in Tetford RV Toilet Water Entry Assembly

I also have to order a new valve, remove the old valve, and install the new valve. This is a VERY DIFFICULT job because of the close quarters in behind the toilet. I have to go pretty much by feel, use a mirror, and use a headlamp for light. I refuse to remove the toilet just to do this, even though it's difficult ... as that would be even more of a nightmare task.