A few years back I helped a guy clear out his dad's garage after he passed, and we found coffee cans full of loose screws everywhere. He kept saying it was just a couple cans until we lined them all up on the driveway and it took two trips with a truck to haul off. Same thing with your parts pile, the number only gets real when you see it all at once. My own shelf is mostly eyball territory and I have paid for it more than once by buying a part I already had three of. Writing it down sounds boring but it beats standing in the shop wondering if that box in the corner is empty. At least your 52 bodies are honest about where they stand.