I did a little bit of cutting with the Everlast yesterday. I still have a lot of work to do trying to figure out cut settings on it, but I feel like it maybe produces a slightly cleaner cut line. Perhaps the torch is working better, as the Primeweld “real Italian Tecmo” (which looks IDENTICAL to the Chinese Everlast torch, and nothing like the torches George sells) always felt a little bit sticky and didn’t feel like it was flowing full air pressure. As a side note, I need to learn how to disassemble and lubricate a Tecmo-style machine torch. But to answer your question, so far I like the Everlast machine.
I’ve come to the conclusion that the Z-axis motor issue was most likely due to a short in the motor cable; which is why it was so sporadic at first. And why it was so bad when I initially rerouted my torch lead, and the IHS/Z-axis cables per @DnKFab’s recommendation, but then seemed to get better again, after running the machine for a while, and then why it failed completely after I loaded the new Everlast torch onto the machine, disturbing that cable a third time.
I think the first Primeweld failure was a fluke (overcurrent light). I think the second one probably still works, and would have continued to work fine for a long time, especially on raw voltage, despite that burnt up looking circuit board and resistor. I have no opinion on what went wrong there; I think it was probably just a bad resistor. @TinWhisperer and I have “made assumptions” that the failed resistor is part of the voltage dividing circuit, and Primeweld seems to have some QC issues around that part of their machine.
I think the Primeweld is still a fine choice for a Langmuir table, but I think Langmuir should change their recommendation to ONLY use Raw Voltage with them. This group is all about eliminating variables, and that voltage divider is a HUGE variable.
That said, for a few bucks more, the Everlast is a fine machine. I like the clear control cover, even though it’s poorly designed, and I like the external air regulator. The machine torch lead is the flat, flexible type with separate conductors and air line, which is much more compatible with the Langmuir machine’s cable arm than the Primeweld machine torche’s huge stiff single lead. It also puts less pressure on Langmuir’s somewhat flimsy machine torch mount. I know that the single lead is considered an upgrade, but it’s overkill for the Crossfire tables, and actually can be a burden to table performance.
“And”, in the words of the immortal Forrest Gump, “that’s all I have to say about that.”
I hope to give the machine a bit of a workout today, and will hopefully have some pictures of parts worth sharing soon. 
