Review on Precision Linear Carriage Printer Machine by Kenny Hrdlicka

Received my rails and they look straight and clean. However, the bottom brackets definitely needed some manual cleaning, which is to be expected with cheaper sets. I soaked mine in rubbing alcohol, took out all the bullets, cleaned the inside of the cart, put them all together, oiled them and they all worked fine except for one (note I bought 2 sets so I had 4 carts). The wagons were very hard and rough. I again spent a lot of time cleaning, trying to file off the extra plastic ribs left over from the molding, replacing the balls with cleaner ones, and anything else I could think of. As a result, I actually have to return one of the guides and order a new one. I hope they are in stock. It's also worth noting that the carriages appear to be MGN12C. I'm not even sure what the MGN12B is, I can't find their specs anywhere.