scratch it with sand paper or some other abrasive material . <| sep |> Filipina , and she ' s honestly one of the most genuine people that I ' ve met in my life . Check out my top post regarding opening up to her about my ADHD and you ' ll see . And alright I got your drift , don ' t bother commenting anymore cause i won ' t respond lol <| sep |> I just did it , and it was easier than I thought . Buy the burr kit with the spacer already fixed to the burr . That would be the hard part if it weren ' t available as a kit . I used the Bunn service and parts manual for reference and to assist in calibration . These were very helpful . My unit was old but lightly used so I didn ' t have any difficulty removing the old ones . With calibration , it was a 35 minute job . I used 2 screwdrivers but one could be enough . Searching on CL and driving an hour each way to get the thing took the most time . I haven ' t done the other mods yet . Working on breaking in the burrs first . That could take a while .