I too live in EASA SDMP land for my Archer so feel your pain! Sadly as I understand it whilst you can dictate what items get attended to within your SDMP any manufacturers limitations and service instructions (AD/SB/SL etc) must still be adhered to. Hence your propeller limitations would still apply regardless of your SDMP.
It's interesting to read the comments about engineering companies above as I'm rapidly coming to the conclusion that there isn't a decent one in the country. You wouldn't give a forty year old car to a classic car specialist and get it back in anywhere near the condition that most aircraft companies think is acceptable in light aviation. As for controlled maintenance I've found that the option is either to hand over total control of the maintenance (and my wallet) to someone who will then tell me when I can go flying, or provide a clear and comprehensive SDMP which is then done on the basis of 'We only did what you told us, so if it's wrong it's your fault'.
The MIP was a good idea in principle but to be honest as a private owner I tend to feel it created more problems than it solved. All that was needed was that the LAMP be brought up to date and purpose for current day use.