Ok, thank you very much. I have a few questions about CHE. I'm sorry for thé beginners questions, but I want to be 100% sure to make the best I could...
a) I Will attach CHE and my thermostat probe should go where, on the top of the substrate or under the substrate on top of the glass, as well as I would do with UTH? Also which temperature to set it in the thermostat?

b) If I would use only CHE to heat it, should I put it on the hot side? To make a hot spot and the ambient would be lower in other side but still acceptable... I guess?

c) If it wasn't efficient enough and I would have to use also UTH, where should be CHE in this case? In the middle?

Thank you for answering!