Quote Originally Posted by billy breach
in my bot I was going to use m12 rod. But your design is similar and you have experienced problems with a threaded rod, so I may go for a car jack myself, to save replacing the rods and getting bend ones etc etc.
defiantly go for the car jack, kaiser uses it and it never has problems(well, not with the lifter rod).
it has a much thicker and heavy duty thread that also will travel faster than metric threaded rod.