No, I haven't tried it. I'm assuming the exhaust ports were more than needed. If Arne said it would pick up RPM, I'd believe him.

I recently sold my AH 2.0cc Dyno on Ebay and never ran it. Now I'm wondering if the "Finger-Block" technique also applies to the .6cc and 2.0cc engines. Arne only mentioned it would work on the little .25cc version.