This is a results picture of my extensive and very expensive strength testing procedure
for the holding ability of the adhesive for the fittings and my PushRods. As you can see, no expense was spared.<G>
I may be joshing you, but the gluing without any drilling holes,
cutting threads wrapping with carbon thread or any of the other things are really unnecessary for strength. You must take the time to make good glue joints with clean parts, but it is more than strong
enough with the glue joint alone.
The top example is an old crashed 5/32" (CPR-10) PushRod with 2-56 threaded rod (CPR-35) out of a Quickie that died long ago.