Im about to give up on my Stihl 290 after several years of use. It just seems like i have been fixing it piece by piece. I am eyeballing the Echo CS590. On the Home Depot site it says that it is 78 drive links. Does this sound right? I am wanting something I can get chains for without hassle. We have two local Stihl shops. Do I need to get a different bar to use Stihl chains?