We are putting a hollow shaft inside the stock Ski Doo shaft. We are rosette welding the stock shaft as specified by Ski Doo. The additional shaft is rosette welded and then welded at each end. This is a fail safe design. The stock Ski Doo welds can let go on the chain case side and the new shaft will carry the load to the clutch side. With the stock drive shaft all the power has to go through one set of welds on the chaincase side to turn the drivers, now the power can be split evenly on both sides. See picture. I'm thinking the machined part will be $75 and if you want us to install it another $75. You can send you shaft to Avid Products, 3656 East Lakeshore, Whitefish, Montana 59937. Our phone in the lower 48 is 1 866 666 AVID and for the rest of you 1 406 862 6296.