RE: Can I use flexible pushrod for the elevator?
I am sure Minnflyer's idea will work. I personally don't like the plastic push rods. I don't like the fact that they will get longer or shorter depending on the temp. This will change the trim and is a pain in my book. Sullivan makes both types. I like the ones that are a plastic outside guide tube with the solid metal inner rod. They require a straighter run than the others but are worth the extra time. In most planes they can be crossed in the rear of the fuse for a nearly straight shot.
David