A couple of months ago I upgraded the plastic subplatter on my Rega RP3 with a GrooveTracer Reference subplatter. I'm very happy with the difference. I live very close to GrooveTracer so I contacted Frank via email to see if I could drop by and pick it up to save on shipping. Super nice man and a phenomenal machinist. His business is right next to the San Jose International airport, so he gets allot of vibration from the incoming and outgoing aircraft. I noticed that he had his office turntable sitting atop a Symposium Svelte shelf that sat atop Symposium rollerblocks. It was a nice set up and worked really well in an extreme environment. I was able to score a used 19"x14" Symposium Svelte, but their roller blocks were more than I wanted to spend, new or used. So, I scoured the internet and finally ran across another company called Ingress Engineered Products located somewhere in Canada that also makes rollerblocks. I bought a set of their Level 2 Version 2 blocks for $95. So far, I really like them and they didn't break the bank.