I'm not convinced they (the CAA) have clearly covered such a case.
If you fail a GST for a NPPL M rating that surely is the capacity you are now exempt from holding.
Are you saying that now exempts you from exercising your differences training covering Micros on an SSEA?
Differences training is training not a "capacity"you are holding.
By the same reasoning they should then pull your SSEA rating covering micros. Don't think so.