Everyone has just about named everything you can do to the Mirage to get it tame. Great concept & as stated by others a redesign would do wonders for this rest.
This is what I had to do to mine.
1. put rubber tubing over the pickup arm
2. put fleece between the riser & the body of the rest
3. put a nice chuck of thick fleece glued to the body where the launcher hits.
4. Had a few beers
5. glued some fleece where the stopper hits
6. had a few more beers
well there you go....eventually is gets real queit once the beer sets in.