CTS Pot, 500k Audio, Long Split Shaft (4 Pack)

You probably needed long shaft pots. If you can exchange them, it would be easier. If not, you can use a dremel and *carefully* route out some of the wood on the back side of the hole to make the body thinner where the pot sits. You need a nit and lock ring below the hole, and a washer and nut above the hole. This way, the two nuts are tightening against each other and will prevent the pot from spinning. Long shaft pots would allow you to adjust the depth from below. These are the correct ones to use if you can exchange them; https://www.amazon.com/500k-Audio-Long-Split-Shaft/dp/B08NCH4Q4P/