Buy whatever you want. But it seems to me your just thinking about saving a few dollars. In the twenty plus years I have owned my Pro 2000 all I have ever done it is replace one tension spring and a couple of new tires for the winder. Never had to reset the timeing, very rarely have adjust tehison from thick to thin. Plus you get the special parts that Ferdco came up with. Like I said at the start buy whatever you want.