I definitely don't think that now. I drilled all my holes to be EXACT fits. The pvc is really stuck in place. I only used some epoxy to deal the top hole to keep creatures out. I have 100% faith in the pvc.

Yeah I'm sure it will be fine. Your rock is quite flat as well and should not be a problem.

zip ties
 

could someone explain the whole zip tie thing a bit better?? I understand the epoxy and the rods, but how do you use zip ties?? Im confused about that. wouldnt you see them?

If you spend many hours strategically drilling holes near contacting points in choice locations you can neatly hide all your zip ties. I couldn't really see any in my old setup.

Makes a really big mess...I did it right in the middle of my living room lol.

ok... so the rod goes through the rock, and then you drill another hole in the rod and rock and run a loop through the rod and into the rock?? that seems kinda redundant if your using a rod, epoxy and they`re stacked

use spray foam in the middle and top/bottom