That is a very well documented method of making up lightweight and rigid pushrods, however I would have thought that a more secure method of connecting the metal threaded portion of the rod to the hollow CF rod would be to screw it into the CF rod instead of using epoxy to hold it in place.

In the past I have used metal rods with only one end threaded with CF rod, but what I did was to drill a hole just the size of the metal rod about 2'' from each end of the CF rod and then make a short 90 deg. bend at the end of the unthreaded portion of the metal rod to allow it to protrude from inside the CF rod and then fill in some 30 mins. epoxy into the CF rod to hold the metal rod in place. The 90 deg. bend in the metal rod acts as a permanent stop while the epoxy keeps it firmly in place.

Karol