Have several chains that need grinding (dirt,rocks etc). Been hand filing for 40plus years but want a good grinder to add to my arsenal. The semington is too $$$$. I like the look of the economec super jolley and the 510 Oregon. I would use it fairly often as I cut a lot of wood for my wood boiler as well as my dads wood for his. I’m thinking no more than 500 bucks. Any advice ?