BEagle, I take a different view to llanfairpg - 20 hours certainly isn't too much. If candidates can't afford to obtain a usable skillset at a suitable standard, then then that's unfortunate. 20 hours is generally achievable, that's the main thing.
Approaches are required, naturally, otherwise what practical use would a rating be?
Some explicit commonality with the modular IR is an excellent suggestion, laying the ground for an upgrade path. A delta for ME is also good to have included from the outset.
Thank you for taking the time to develop that suggestion - not just for its inherent merit but also as a beacon of light in a thread that had otherwise lost its way!
I've a lapsed IMC, so am not competent to comment on the proposal in detail, but in summary I have to say it looks good to me.