u are correct wades are very good as they built my latest cam we sat down and built a can on the computer there that will let my motor pull up to 10500 rpm .
the a series is $400 and only made to order .they are alloy with steel insert for clutch so u dont wear them out .i have been running one and reving my datto 1200 to 9500 - 10000 rpm .and they still look as new after a season of racing .email me if u want to chat more
is way to much i pay $90 and i go in and get mine made ,only way u will pay high is a billit but u can no longer bye them .i have a few and will not sell as they are old school nismo cams built for full race motors .