Few news and a question about backslash.
After having repared my hotend soldering a new thermistor to replace the one broken.
I had thightened the X and Y axis and I got more problems with the UU bearers. They block the move.
Is that backslash? Will it be better if I replace the MXL PLA pulleys by aluminium ones? Do I have to replace all my T2.5 belts and pulleys by GT2 kit?