I used to pay a company a £100, I think, and they came in a lorry and they ground the disks in a machine. I enjoyed the fact there was a venerable stick to ram

I used to pay a company a £100, I think, and they came in a lorry and they ground the disks in a machine. I enjoyed the fact there was a venerable stick to ram into the machine when the mechanism got blocked. From a security point of view you observed the destruction and got a certificate as a paper trail. I used to keep a sample of a ground disk on my desk. The company also got the kick back of melting the disk down to recover the minerals.