Loknob was very kind to give us two of their knobs for demo and review. I somehow managed to really mangle it up though by trying to install the wrong size knob on the DOD 250. Eventually I realized my mistake and corrected it. In the end I’m really impressed with the quality and function of the Loknob and can recommend them for anyone looking to keep problem knobs in place. Keep in mind that once I had my mistake figured out it only took a few minutes to install and the modification is 100% reversible.