Currently investigating going the Mach4 route with a new build (still working on a LinuxCNC with Mesa cards as well).
Is the 424 that much more popular than the 416 just because of the isolated USB and 4 additional inputs?
Also, when I see things like "in the future" or "coming soon" (in reference to threading with these two boards) in product descriptions I get a bit worried. there have been way too many products and software that have left many in the dust with open ended promises.
Since this is for a lathe application, that is an important detail.
Anyway, still in the early stages, and wanted to know what I give up, if anything, with the 416 vs the 424.