I'm not sure what I can do, we can try some of the later 'NDRV's for the Silent Upgrade and see if they don't have the issue I ran into that forced me to use the one from 10.3.7?( I think ).
I don't remember what the issue was anymore, but it was something.....
Please try to remember, if you can. I've been staring at dissassembly of both of the drivers, the one that you used and the latest one and they don't look that different to me. I have a feeling that the solution is right in front of my nose, but I can't see it due to lack of experience.
Check the Compatible property for the Silent Upgrade and see if they changed it. I don't remember what the Old Mini's property was?
If they changed it there will be a New 'NDRV' we've never tried before.
Both Minis are identical.
name ATY,RockHopper2_A
compatible ATY,RockHopper2