From what I have been able to piece together (nobody says this explicitly) SailRite machines are the same
design as several other made-in-China machines, but are not necessarily "the exact same machine." Originally, (their "version 1") it seems that SailRite used to
import these generic
cheap machines, "fine tune" them, reinforce a couple of key
parts, add some accessories, then re-sell them at a higher
price.
Fair enough - we've bought a few pieces of inexpensive Chinese farm
equipment, and they all seem to require that kind of tweaking to get them to
work more than a few days. If you're capable of doing this sort of mechanical
work yourself, you can often get a pretty decent tool, cheaply - with some effort on your part, and maybe a couple of trips to the local machine shop.
SailRite claims that they have taken that basic design and had all new molds made so that their cast
parts are more robust, have closer tolerances, and are made of better materials (Their "version 2"). Their
shows some fairly convincing quality differences in the parts. Of course, they could have cherry-picked those parts. And the video was from 2010, so it seems possible that the "other" guys
could have caught up by now. And we don't know if SailRite's Chinese connection is really so "exclusive" as they claim. One would have to take apart one of the
cheap machines for comparison to find out. Some of the on-line
reviews suggest that they still have the older hit-or-miss quality though.
I haven't found any info comparing the motors, other than one guy recommends replacing the motors on the cheap machines with a specific model that he found on Ebay.
In the end, I'm still kind of on the fence about this. The cheaper machines might be a bargain, but it's a bit of a gamble. One might end up having to buy so many parts from SailRite that you should have started there in the first place.