Great day flying! OS 46 AX, 11X5 APC, MACS pipe. Balanced at 4 5/8" with 2 oz. lead as far forward as possible. Set my JR 8103 with 30% expo on low rates, 50% on high, really smoothes this plane out. Once I get comfortable I'll set up the 3D rates. I am assuming that the nylon bolt supplied was some close metric equal since other hardware supplied was metric also. This is my first low wing / 3D plane and had no problems floating in just as my trainer does. Still running new engine on the rich side, after it gets broke in I'll go for some more aggressive flying. Not sure this .46 will be enough engine for harriers, but it does fly the plane well. Ordered a 12.25 X 3.75 prop and hope that will float the Twist. Hope to fly again Wed. and will post more later.