Don't sweat using the Everlast - I know a lot of pro shops that have bought those and run the snot out of them . Pretty big bang for the buck and the extra controls they have come in nice if you know how to use them . For sheet work , try some experiments using 33% backround and various frequency settings on pulse - once dialed in to the gauge metal you're using it can help keep the heat down . Most only complain about how their controls are laid out - pretty much backwards to Miller and Lincoln .
You could switch out to a 17 series torch but they run out of steam at around 150 amps . Fine for most work and I prefer my CK twist lock designed 17 - I can get that nose in almost anywhere and have even used it with a mirror on the back side of tubing against a vertical panel , lol .
The torch model I have for running with the Dynasty 200DX is the CK FL1525SF (air cooled flex loc head , 25' superflex cable) . Be aware that CK uses world standard metric threads , but their head parts will interchange (they call it 2&3 series) with any 17 series out on the market and CK does have adapters to swap from the metric to SAE thread standard cables . I switch back and forth between CK's stubby setup , long standard gas lens heads and 2 different size glass (clear , see-through) 17 series nozzles w/gas lens . Those gas lenses using the screens make a world of difference in the gas column coming out of the head - cut my argon usage in half , not kidding . It is by far my favorite torch and plan to get a bigger 250 amp series w/valve to run dc scratch start off engine drives and such soon to give me more options .
I had one issue with my original flex loc - melted the locking knob and kept having issues with excessive heat . Something wasn't right in the head with the gas passages or something ...they sent 3 free new knobs and a week later sent a brand new torch kit complete - no charge . Mine was 2yrs old at that point and they were told that , just wasn't expecting them to go out of their way that much but their customer service is second to none . If you get one of their torches , just note what size heads work with in their series numbers and download their pdf catalog - makes it a lot easier finding parts and getting different head setups and kits ....
Sarge