UMS 50cc 7 Cylinder Final Break-In Run

UMS Radial Engine 7-50cc 32-1 semi synthetic with 1oz seafoam per gallon MA Classic 20X10 prop 12lbs of thrust @ around 5800rpm The static thrust stand is the cause of the annoying vibration (sorry) Approx. 1-1/2 gallons of fuel through it so far