Unoear,
to establish a fair comparison between Rockport and MS you may consider running the 8000 with a VPI SDS and a double flywheel. The weak side of the MS transports in the old days were the motors not the old blue guy :-). I know you have a strong motor but it is worth a try. You will hear the difference in your wonderful system - maybe one day.
These units look very familar to me, have followed their anchestrial roots I guess.
If you put anti vibration measurements on the wooden doors this is also very good for the sound.
But at this stage the installation looks pretty damn good. Don`t spoil the guys too much, they are used to a hard life full of privation living in remote hill side or lake side environments.
best @ fun only