That's correct on it tending to run cold out of position. It would probably do okay with 1/16 7018 for flat or overhead, but any time its asked for more current I've been able to switch to an 1/8 7014 and run without issues. I didn't mention it's an inverter unit so it does run very hot for what it is. It's classified as higher amperage, but the dial number stops at 80, so that's what I'm going to call it! Here's the link to their site, I got mine for about $225 on Amazon. Given what it is and the price, I believe whether or not you get a good one by luck of the draw, but they are one of the higher rated machines.
Forney Easy Weld 100 ST Stick Machine | Forney Industries