So in the crawler world, Holmes Hobby had a servo that JX had copied. Pretty much an identical copy but using cheaper grade material. The owner of Holmes Hobby confirmed the JX clone and supposedly the JX servo had more durability issues as well, just skimming thru the forums. I own a JX low profile servo ($15 shipped), and it is no where near as fast/torquey as the specs say it is. However, it is $15 so what do you expect.

It is possible JX could be an OEM for Protek (which they are known to rebrand many chinese products). Or it could be a knockoff using cheaper metal. Who knows in this case... I just wanted to point out the Holmes Hobby issue.

"JX servo is a bit of unfortunate circumstance for me. They are a former employee of my OEM, took the engineering work I did on the 12v servos and started JX. Not surprising that they are using cheaper gear and pin materials though, that is standard china practice to make things as cheaply as possible but look like the "quality" knockoff. I can see plainly that they took the entire design from the V1, which had enough flaws to warrant a V2. There is also a "new" 12v servo on the block that JX is supplying. Good luck buddy, I already know what your failure rate is going to be. Better be prepared to lose your shirt or piss off a lot of people. Even my own OEM had some choice words about the quality of JX, and you know it is bad when a chinese company is talking crap about quality.

My v1 gearset should drop into the JX case. If anybody wants affordable gears, give them a shot. I'll refund your money if they don't fit. Most likely, your case is already too damaged to avoid further gear issues though."