I have RBI racks, they work just fine. I have belly heat in them. I made my hatchling and juvie racks, those all have back heat and I've never had any problem with the heating aspect, only my shotty craftsmanship.

I am going to add some more juvie/male racks and think I am gonna go with the 'ultra series' set-up from Repti-Racks, I've been doing a lot of research and they seem the best way to go, to me.

That's my 2 cents.