Alright, I went through all 92 pages and found no kits but I did find
KludgeGuru talking about his 12mm rod upgrade he was doing but no results yet. I doubt a true kit exists and 8mm is far too crappy (you hear this
QIDI TECH ) to be used considering the knock off you copied uses 10mm and they used 10mm for a reason. Did your engineers not understand this or were they overridden?
When I can get 10mm and 8mm smooth rods for the same price from a quality company like Mitsumi I know you being in China, AND a manufacturer, could do even better so there is no excuse for the use of 8mm rods. Even on this thread it talks about Z wobble due to the 8mm rods whereas the 10mm rods used by the manufacturer you copied didn't have it. SMH.
Yep, PC is a nice one to use but very esoteric still.