Brass don't marr up anything, so you're not as afraid of hitting stuff with it. I had a heck of a time trying to find brass punches, chisels, etc. My dad ordered me a brass hammer, and a 3 pc. brass punch set along with an extra long brass punch with a smaller end to it for me for christmas last year from northern tool. When reinstalling don't be afraid to put a tad bit of anti-seize on the splines. Make sure the brass bushings in the couplers are in good shape, they like to oval out. I believe they can be bought at your local hardware store (maybe an ace or true value?) for $2 versus paying $20 or whatever the heck the poo dealer wants these days... Poo Blue oil went up from $28 to $36. Chaincase oil went from $12 to $15. I can get Klotz cheaper than that! Last week,I got new plug caps for $3.20 a piece from Fleet farm, Poo dealer wanted $21 a piece! If you start getting black dust on your plugs when you pull your plug caps off, the resistors inside the plug caps most likely went out and the whole cap need to be replaced. Pure rubber caps work best and last the longest. Some have noticed a bogginess, I didn't notice any difference but I don't have black dust anymore. I know we need to support our dealers these days, but if I bought everything from them, I wouldn't be able to afford to snowmobile. Had to pay $22 for a washer last year since it was a "polygonal" washer that was Poo-specific. Sorry about the rant, just hoping somebody out there got the message...