When did you try it? It was updated this week to make it work with the DE and Salvo precision stuff specifically, the older one also required replacing the nozzle with a GM just like the FEDA.
I don't get how it was too hot though, as to get joule creep to bring it over the limit on the stock DE inner barrel, I had to use higher pressure gases + 0.43g BBs.
Unless of course, you've accidentally gone and bought the not quite MWS CYMA Gas System version, at which point you're up shit creek without a paddle.