I have an EHPro KFL+ clone that I sub ohm on a mech mod and I'm really thinking about getting another rda tank style attey for my MVP2. I'm looking at either the smotech RSST or another KFL+ but I have no experience with genesis style atomizers. What are ya'lls thoughts on the RSST? It's about half the price of the KFL+. How does it compare to the kayfun?