L.M.Cox Medallion 15

I got LM Cox Medallion 15 motor from Yahoo Auction the other day. It has been giving me a strong motivation to set up throttle valve for speed control since half a century ago. Lightest crank case with machinery cutting and grinding method and Schnurle scavenging port type combustion design.
After disassembling this motor, an idea came up in my mind to make the red plastic part that is forming the carburetor construction with a light metallic material to set up throttle system.
This plastic part plays a part of just holding carburetor and has nothing to do with intake port timing. So, keeping splay bur in position with adequate fuel amount is the only duty for this. Consequently, under the condition of avoiding pressure leak, making up throttle body holder construction is my work.
In order to remove this part full disassembling task was required especially for removing a drive washer the precise oil press machine was indispensable, removing a drive washer with press machine is a key to do that. I'm going to show the steps here to make a one-off part with casting method in very near future.