I trail rode my mtn for two seasons.First season stock.In stock form I found it to be way to tippy with a harsh ride.Would definately widen the front end(you'll need new shocks because the mtn has shorter ones stock)highly recommend the ohlins all the way around this sled!Diff was night and day!Bump capabilities tripled with the shocks,wide front,longer links,12mm sway bar.I relocated the rear of skid higher up on the drop brackets(sucked the skid up into the tunnel more).This reduced ski pressure and allowed me to pull the skis on demand(important tool when trying to get over rough terrain at speed)I think the 05 skid will be way better and will require much less tweeking than 03 and 04.The ohlins were a must for me on the rear (expensive 7-800$ )hopefully not necessary on the 05.I went further and got some aluminum dirt bike bars(wider and straighter)Most other issues have been adressed for 05.I love my mtn for the trail now and will be adding the turbo this summer - get the 05! great machine the 151 hooks up on the trail!