The tape around the hose just insures a secure fit and hold while playing. There have been times where the hose would slip out of the connectors for some setups, for others they don't have that problem. I haven't experienced that happening yet, but rather than find out the hard way, I put a little tape as a precaution.
For the loose revy, you could try tightening the screws surrounding that area. Otherwise, just use a dye spacer or even a small piece of electrical tape. Both should work fine.
Silent in Error
Vocal in Spotlight