The UvB unit sits 27cm above the branch. It's only an 8w unit until the bigger one comes so will I need to keep it a bit closer for now?
Yeah I would like more branches but struggling to find anything big enough. Hadn't thought about building a frames system, that's a good idea!
No there's no tape holding it up

They are permanent hooks made for bathrooms, I've used them around my reef tanks for years with no issues even with saltwater so I'm pretty confident they'll be safe to use.