My naturally aspirated modded 08 M-1000 162 S/P, weighed 567 pounds full of fuel, oil, extral belt and tool kit.
My 08 Twisted turbo M-1000 162, with basically the same lightweight mods as the above sled, weighs 572.5.
I have a Timbersled front and rear ready to install, which should shave another 15 pounds or so off of that.
The turbo sled also has the diamond lite on it, so that will skew the weight somewhat. The turbo sled is now running almost 50/50 weight balance on the front; whereas the non turbo sled was closer to a 60/40 split.
You should see similar results on your M-8, 5 to no more than a 10 pounds of weight gain on an otherwise stock sled, if you gut the hood. Power gain......WOW!!!!!