Moving to a Steel Cage: Queries and Answers

I’ve always stuck to plastic devices like the CBx and HT types. I recently picked up a new small HT3, planning for my wife to keep me locked whenever she sees fit (which is basically all the time). However, I’m feeling a bit unsure about where to begin with steel options and have quite a few questions. Before diving into those, here’s one specific thing: Is there a solid FAQ or guide that might help answer these questions so I can educate myself?