Thier all copper ones are nice, but benifit from lapping the bottom to 600 grit wet/dry on a piece of plate glass/mirror. The ones I had were not machined at all, but performed well after lapping and were quiet to boot.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.