The SCB is is very durable and adjustable. Every few months, I refresh it on the spinner using 35 Micron Trizact, and it's good as new. The ball also takes polish well. You can easily set it up for anything from medium to heavy.
You wouldn't think so, but the particle cover seems to need much less maintenance than the aggressive Brunswick reactive covers used on other Lane#1 equipment. It seems I have to bake my solid Uranium in the Revivor every few months to keep close to NIB reaction.