How to put together cut to length pushrods

Yup, practice a bit. It's not hard, use the lathe. Use a back stop. Cut the pushrods .010-.015 long and trim them in the lathe with a dial indicator.

It's not hard. I just usually buy the right length so I don't have to screw with it. I have shortened a bunch of them though.
I needed 0.157" longer pushrod than stock (mechanical lifter pushrod.) I couldnt find them anywhere and local part shop said this cut to length version is only option.