Don't worry, I know my babies! Heat has been a problem with the fidelity models until the introduction of - hm, let'S say the Sensory8/9-model line. Many pieces fell victim to this problem. I use to position them on 1cm high mini"feet", for that reason, and no textile-covered table. The problem has been at least as great with many Novag- and SciSys-models. Remember , these are the Challengers! Treat them with respect.

the later arriving Mephistos never had probolems with heat, as to my best knowledge (excluding the high-tuned tournament-machines).