I cut my rods to length from #2 or #4 stock, and use a 2-56 or 4-40 die to thread both ends. Takes 3 minutes. I also cover the rod with CF, epoxied for additional (compression) strength. Ball links for both ends.

I trust a solid rod implicitly more than a soldered end connection.

To the point of an earlier post, commercially available dies are all right-handed, so I cannot make those nice counter-threaded turnbuckle type rods. But I can make rods any length i need from what i have in the shop. If anyone has a source for LH dies, that would be interesting.