I was thinking they were defunct (this cam is well over 20 years old) -- I wasn't finding any info at all. Thanks for the tip.
Responding to other posts, yes, I did degree it, and the timing mark was dead on. So the Clowes double roller with 3-position sprocket is apparently a well engineered piece.
Give Crower a CALL,not an email. Ask for Oliver Reed. He's their sharpest, cam guy available. Email gets generic answers at Crower.Oliver,knows his Crower sh*t.