ALERT!! SOUND THE ALARM!!..

PRH said
FWIW....... this one and an actual Comp Pro-magnum fit just fine.

View attachment 1715433874

The rocker that had the contact with the retainer was a PRW, which I’m told is the same as the SM rockers....... but I haven’t had a SM rocker in my hand, so I can’t say for sure.

I seem to recall Speedmaster had purdy aluminum rocker sets that were spec'd for 1.25" springs. I bought the stainless steel set since that is what they use for their top end kit.