Lead screws - M8 instead of M5? I am building a Prusa i3 MK2S (Dolly). I find it very difficult to find M5 rods for the Z axis, I have an M8 lead screw with 8&nbsp;mm lead, So I thought since M8 is widely available online I could just use them instead of M5. What do you think about it? What should I keep in mind?
as long as you match the parts that is ok.
The m8 rod will give you more stiffness and will be harder to bend.
As the result, you will have to calibrate the steps/mm settings in the firmware.