Looking to buy a chain grinder. I'm good at filing chains but due to working in almost exclusively urban trees, we are hitting nails, fence, hidden screw eyes from ancient hammocks, etc and once the teeth on one side of the chain are shorter than the other, hand filing only goes so far. This is going to be used exclusively for occasions when I need to fix the uneven length in cutters. I'd love input on old models that are easy to use, newer stuff that works well, whatever. Thanks in advance












