...have you required a fix because you are still using the old style shaft in the C&G or have you found that you still need the fix with the new style shaft?
I have several C&G units and have tried several more -- NEVER a problem with any of them as long as the drumshaft doesn't rotate -- except this one unit, and only in certain circumstances. It's an odd situation -- doesn't matter what Drive I use. It only happens on the right side, at CPMs above 70 and speed beyond about 5.5 MPH -- takes about 5 to 10 minutes to retract the lever. I don't know if it's the C&G unit, mounting angle, or what. I tried some other things as well, but couldn't cure it.
In the early C&G days there was a problem with my older Drives walking out because of a rotating shaft. Also had a sliding shaft. The replacement spline shafts solved those problems though.
What do you mean "didn't feel they [bungee fixes] were secure enough" ? Did they continue to pop out despite the fix or did you perhaps feel that the solution was just a bit makeshift or something ?
The Spectra line locking system never failed, but was too easy to inadvertently unlatch. I also felt the exposed line was not as clean a solution as I wanted. I really like the V-2 C&G screw -- looks clean, no removable parts to lose, 100% worry free, takes 2 seconds to engage/release, almost looks factory installed.
With the lower screw mount (Version 1) it was easier to make, but the cover plate had to be left off and the screw was harder to reach -- other than that it worked fine.
I think your bungee is worth a try. If it works, you save a lot of effort; if it doesn't, you still have other options.