No So Boring!
I've been plagued with really poor ISP performance over the past weeks so apologies for the very short report.
There are some situations where my test clips are unable to connect to devices so I have printed my own plastic AA cells.
The current generation is good with a hole in the centre and a groove to enable the wires to be easy ported out.
On the left are the ones from the picture above (the second revision of of the design). The ones on the right with green wires are my first design attempt
(with smaller axial hole, no groove or central hole). All work.
Here are two in a hand detergent dispenser to demonstrate their use. I used copper braid (recycled soldering wick) as the contacts.