Mother x4 connector destroy the pins of addon boards connectors,because they not fitt togeder well [...] It happend If you not have the cpc mounted, and you are continously mount/unmount the cards. The two connector fit to hard. So you make force, and at some time the pins of the addonboard left out the connector. I have to use a screwdriver all time to put the pins back every time i use it
You know, I have an email (and PM) and promptly answer about my CPC expansions boards (in english, french and spanish). I'm not dead, just not here. (except now, to confirm the rule)
The cause to your problem is into your answer... You don't use them in a "normal way" and forcing is never a solution to a problem.
Because you plug/unplug many times the boards, the pins should bend a bit and are no more properly aligned to the MotherX4 female connector.
A way to fix that is to use a ribbon cable with a 50 pin female connector with key (not whisky) and plug/unplug some times to straighten the board pins... (your welcome)