Hi Proparc. Answers to questions.
rpm on: - 15% Omega
12x6 APC - 8,300 four 12,200 two
12x6 Evolution - 8,000 four 12,000 two
12x6 Modified Zinger (from video) 8,000 four 11,800 two
Bore: 0.945" (24mm)
Stroke 0.850" (21.5mm)
Muffler type: TBD
Vent size 0.200"