Nice work MC. We were working along similar thoughts.
Here is mine. Basically what I was saying. A couple reasons I went the way I did. I had intended to initially use stainless steel. It doesn't rust (obviously) but two its harder than alu, but softer than most steels so it wouldn't be too hard to work with, especially the tapping. It also was available in 6mm dia. As it turned out, it was still pretty tough to run a tap thru, and I didn't want to break my tap. I bailed on it and cut up a bent pushrod instead. Also, I don't have a drill press yet, so making a really straight bore hole w/ hand tools would be tough. Using the bit I had, I sent it down the backside of the adapter so it would automatically line up. I would have liked to leave some of the adapter left so the threaded insert would lock into the adapter, but it was too much of a pita for the tools I had. If possible I would try it this way.
The pushrods are 7075, and are threaded in rather than bouncing on threads, so it should last a while. Also, I used a 5mm setscrew locked in w/ red locktite on the end so it could be removed w/ a hex wrench. As said, the Revo soon enough went on the shelf, so I haven't put tons of hrs on it.
