My pleasure if we in the "trade" can't help each other nobody else will, this may help:
https://www.theimi.org.uk/mot-quals/
For me the appeal of the IMI is they are only focused on the Motor Industry, unlike City & Guilds, BTEC and the like who are multi industry. The curriculum's are as upto date as anyone's although I think they have to give these to other bodies, the assessments are well thought out, well they were when I looked at them a few years ago.
I think they are losing relevance under the current CEO/COO and I can't see any value in retaining my membership, however this is a personal view.
Good luck and don't hesitate to PM me if you need more help.