Very rare HP 40 motor

Probably over 50 years old Schnuerle HP 40 motor(NIB) arrived from Yahoo Auction seller the other day at very lower price, lack of genuine carburetor made the bidder hesitate to proceed.
OS 2C carburetor with 7 mm diameter throat and Irvine muffler fit well with 300 gr weight in total those are 100 gr lighter than OS 40 LA.
100 gr pulling down factor while the maneuver drawing has much to do with the character of the flight wherever the factor might affect on, motor, servos, battery etc. In spite of wearing ball bearing crank shaft supports F/R, delicate designing of the motor brought the lightest weight, iron cylinder and alumina piston with ring construction.
So, I made up mind to construct Yoshioka Pegasu Acro for this lightest HP 40 motor.
Let's see what will happen on the lightest Acro model airplane burdening the lightest motor.