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 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?
Amazon has a few hundred M5 rods listed for sale, so I don't know where or what you've been looking through.
If you change the lead screw, you'll have to change the threaded parts on the gantry assembly to match.
More important, you'll have to adjust the Z-drive "steps/mm" setting to match the 8mm lead. (with thanks to Professor for pointing out my error)