I got a hold of a set of these weights and installed them in my 09 twisted m8, the sled was built by twisted and had really responsive clutching to start with and was on the target rpm but the rpm would spike 200 over then level out with good backshift, but the rpms still went up and down 150 non stop.
I wanted to see if these MDS weights where up to the challenge so I took a spare secondary clutch with a stock 36* helix to the hill and found a good hill to do some testing, with the twisted setup I made several pulls to check track speed, rpm, and put some highmarks up. I then changed out the weights right on the spot and installed the MDS weights and stock secondary with a rock rollers and shift assist.
First pull it engaged nicely and right away it felt smoother and had more pull out of the whole. The rpm's where within 50 of the twisted clutching and held within 50rpm once peak rpm was reached, it also did not spike rpm it just climbed up and held. Once on the boost the backshift is near perfect. Belt and clutch temps where way down also, noticeably cooler.
At 10,400ft elevation and 2+ft of pow.
Twisted
Boost --6lbs (6-7lbs is the limit on pump gas with this setup) gt2871-2 turbo
twisted clutching, 7lbs is comparable to a bd pg kit on 8lbs.
track speed -- 42-43mph (even though it seems like low mph it would flat out beat a piped m1000 that says its running 47mph track speed, turbos are just different)
RPM-- 8100 (as close as I could tell)
MDS
Boost -- 6lbs
track speed-- 51-52mph (9mph over twisted clutching)
RPM-- 8050
With the twisted setup I couldn't make the climb, with the MDS setup it went in a straight line up and over. Very impressive.
I tried the twisted secondary (I think it has a 36/44-46* helix) with the MDS weights and had 46-47mph track speed and didn't hold rpm up top as well.
One thing I really liked was when I turned it up to 10lbs of boost I was still in the rpm range and it flat ripped, maybe a little high rpm but still worked, so if I was running rg-pg mix on 10lbs and had to add straight pg my rpm was still in the right range to ride.