I'm writing this post to describe my experience with the 3D stuffmakers Prusa Mendal gen2 kit.
This was the first printer i ever bought, its large build volume and price instantly caught my eye.
This printer like many mendal kits i'd seen were a DIY kit. Over the course of 2 days after uni i built the kit.
Problem number 1 To my surprise when i first got the printer moving i had problems with the z axis skipping steps.
After messaging stuffmakers and attempting to explain my issue to them they were no help. After a few frustrating hours, i was finally able to solve the problem. This instructions do not tell you to check the length of the angle all thread. So i was finally able to start printing parts.
Problem number 2 appears. The inaccuracy of the printer. When printing a 25mmx25mm cube the cube ended up 3mm undersize,
Once again sent them a message for advice and was told that i built the printer wrong. When doing some research I found how to calibrate it by changing the steps per mm in the config.h file which isnt supplied to you and they refused to supply it. After some more research i found the gen 6 cong file.
Problem number 3. After printing for long periods of time I discovered the hot end would often move down and ultimately affecting the print. This as i found out was due to the way the hot end was held in. which is by a grub screw so when everything heated and expanded it would lose its tension.
Problem number 4. The printer bed wasn't flat and had a giant bow in the middle. I ended up making my own alloy print bed that was much flatter.
Problem number 5. The heated bed ended up burning out a track during use. when i contacted stuffmaker they blamed me for the issue (which i don't know how you can burn out a track using there own power supply.) They charge $120us for the heated bed and powersupply. They offered to replace the heated bed only for $100us (very unreasonable).
After all of these issues i decided to change all of the electronics to use ramps 1.4 and a mk8 extruder. Since making this change I've had no issues and have had excellent results.
I highly recommend people to avoid buying from 3D stuffmakers.