@katieandiggy is giving you excellent advice. She's saying all the same things I would say.Does anyone get concerned that coir is damp? I’m thinking in regards to humidity and shell rot?
I just want to add: Somewhere along the way it seems your read the old info that humidity is bad for tortoises. It isn't. Its really good for them. Moderate humidity of 50-70% suits all of the Testudo species very well. Shell rot is exceedingly rare in the Testudo species. Not impossible, but very very unlikely to ever happen. The coir needs to be kept damp. It will get dry and dusty if not kept sufficiently damp.
Sounds to me like you are on the right track for everything. Tim is a lucky tortoise!