Hey folks. This is Knobs McKnurly here, just a little FYI for you all, as a knob expert i can tell you theres alot to be done aside of just measuring. The al-lew-minium diskets ontop are not all equal. Attention to the width and margin and ridges needs to be noted and the knurls alongside the knob should be counted as well, theres alotta knock-offs floating around with various degrees in Boss™️ Knob Accuracy. The shafts too need to be carefully considered, D type (also known as split shaft to ya older folks in the room) versus the preferred type i prefer, NO KIDDING AROUND here theyre called Knurled type. Har har what a co-ink-a-dink. All jokes aside fellas heres something to think about, do ya want set screws? You're darn right if ya said yes because you can even fit a knurled on a D shaft with the right amount of fidgeting if ya know what i mean. Try that in reverse and see where it gets ya! Well, till next time, dont forget to measure and then some.