O' great Sax Masters, again, I approach with humble question. I am trying to level the inside of the padcup where the key-touch profile has created a ridge in the padcup. I am attempting to smooth out these ridges with a grinding stone attachment to the rotary tool. I have attached a photo to show what I am working on. What is the proper procedure to complete this job and do you think it is necessary? I really appreciate you taking the time to share your precious knowledge and experience!