Thanks for that... I was looking at a 2N3054 as the traditional driver transistor for the 2N3055s, but I don't have any of those in my parts bins. The BFY50/51 should be good to use in that position. I suspect that the other unidentified transistors could be 2N3904 and 2N3906 (in the CV/CC supply project).
In the other project (the dual tracking PSU), I suspect that good types for the NPNs are BD137 and the PNPs are BD138.
Yeah, the LM723 was, and still is, a versatile voltage regulator. Too bad the metal can version is out of production; they were used in many commercially made power supplies, and replacements are hard to find and can be expensive.
Cheers,
Dave M