Dear Frontcut , do you kno someone or have access to locating a silvey 510. I kno where a silvey is . I kno the unit is a silvey not sure if SDM , has been used once or twice, owner was disgusted couldn't locate anyone that help him use it , or understand the instructions to make it a square cut chain grinder. I will check the next time I am at his house if he would do some trading , or sell it. I will need your personal cell number , to send pics. This isn't a scam or b.s. job , this is the real thing. I have been beating this around mentioning it . There is some surface rust or discoloration from the salt off his hands I guess I have looked at it. Let me kno your thought on this , Frontcut. This is practically a new silvey or is. just not sure of the model number . I kno it's not pro sharp , but is a silvey square chain grind and he could not figure the dressers , this is how unused the unit is. I cut wood with him when he goes. The next time I go over and talk to him. The weather has been colder than a well diggers aspirin . Frontcut , does this interest you , he isn't using it and it's just setting there under his work table. Thanks Buck