Todd - do the Everlast 210EXT adjustment ranges and specs, from what you can tell, match those advertised for this R-tech Digital 210 unit?
http://www.r-techwelding.co.uk/weldi...ries_210A_ACDC
(For example, is the minimum AC current setting 10 amps as advertised for the R-Tech?_

PS - I noticed that the R-tech advertises "electronic HF", (which implies there may be no spark gap.)

The user interface of the R-tech also sure seems pretty similar to the Everlast 210EXT.

Thanks for the detailed review and info! (And please keep it coming, as you use the machine and learn more about it!)