Machinists jack

A small "Machinists jack" type of thing to help level long stuff. The center has left and right hand threads to complement the left and right threaded ends. The idea is that both ends can be held in place under preassure and you can adjust the distance between the ends by rotating the center piece.

I printed my in ABS but PLA should do just fine.

Use random layer start point if available, it helps to keep the thread clean.