I have a slim that I want to sell, before I do I want to make sure that it's able to be repaired. I'm not going to repair it or have it repaired, maybe the person that buys it will repair it. Everything works fine but the four things that adjust the blade. On the way up they work fine, when you turn the setting to 1 they are still where they were on 9. The razor in the photo is just one that I took from google. Any thoughts?