I have posted a piece here which is also on the TT topic, but is more general and I think a new thread would be better. Your voice is heard. See below.
In a manufactured version there would be a single crimp socket for the tails cable Chris, this is to show the idea, and making a crimp socket from scratch rather difficult, thus the butt connector. Crimp connections are very reliable, and the copper bar clamps very firmly in the devices, there is nothing that can move to a different position if the tails are moved, so the screw is very unlikely to come loose, as you say just like the busbar. The hook is made to completely fill the terminal, it really cannot move. The speed advantage over trying to bend and fit the tails is considerable, perhaps 30 seconds to crimp, 30 more to insulate, and a few to tighten the cable clamp. Bending the tails for side or bottom entry can be quite difficult without the gadget, and the clamp is never as secure as one might like, and twisting the conductors is not very easy once shaped to fit. They never fill the terminal fully so can always move around.
In a manufactured version there would be a single crimp socket for the tails cable Chris, this is to show the idea, and making a crimp socket from scratch rather difficult, thus the butt connector. Crimp connections are very reliable, and the copper bar clamps very firmly in the devices, there is nothing that can move to a different position if the tails are moved, so the screw is very unlikely to come loose, as you say just like the busbar. The hook is made to completely fill the terminal, it really cannot move. The speed advantage over trying to bend and fit the tails is considerable, perhaps 30 seconds to crimp, 30 more to insulate, and a few to tighten the cable clamp. Bending the tails for side or bottom entry can be quite difficult without the gadget, and the clamp is never as secure as one might like, and twisting the conductors is not very easy once shaped to fit. They never fill the terminal fully so can always move around.