Mine was also a 2019M, when they discounted it a couple years back. I bought an induction heater to go with it and I call this setup my "click +5" as I need to wait 5 seconds after the click to get the vapor I like. Surprisingly, it doesn't burn my weed at all. Might be a poor quality heater.
That's the only Dynavap I got. Are there many differences between models?