So I am looking into getting a 421D cage from boaphile for my spider. When I bought her off of KS (She was one of my firsts) It looked like she had suffered from burns from a heat matt or something along those lines. Anyways, She is my favourite so I want to set her up well lol. So for heating, Everything is a bit fuzzy for me, which is better? The panel or the belly heat with the flexiwatt? I also have a Rhinorax from boaphile with a double thermostat for the rest of my snakes (also balls) but there is only one prob. How would I measure the tempature using these thermostats without a prob? Or do I need a COMPLETELY different thermostat, all for that one cage? I am not experienced with flexiwatt or the Radiant Panel at all. And with the panel, how is that hooked up to a cage like the 421D? Inside? Would it burn them? Or do I need some sort of cover for it?

Seperate question, her belly has always looked rough since I got her. The marks scared me when I first got her because I thought it was some sort of scale rot. I took her to the vet and he said it may be somesort of bacterial infection if it wasn't burns & gave me injections to give her for 4 weeks. Nothing changed and that was 6 months ago and nothing has worsened either. She hasn't acted unhealthy, she eats well, is active at night, clean sheds, but lately she has not wanted to sleep under her hide, just under her basking light. The temperature where she sits is 90-91 so I'm ASSUMING she is just basking but its odd to me she doesn't care if she is out in the open at all anymore.... Should I be worried?

Thanks!