Blazeone,
Sorry about high jacking your thread! We really don't mean to do these things, it just happens because we are all interested in regulation of doubles and this is exciting for some of us to find out how the big boys do it. As far as your Sabatti goes, I would suggest that you have a really good recoil pad installed, something like the Kick Eze and forget about the mercury recoil reducer.
The recoil pad will do you more good and won't increase the weight as much. I'm glad you got one of the good ones, some of the earlier ones were said to not be regulated well at all. Bob