First run after ring replacement. On this run I experiment with a Fox Miracle plug just for the heck of it and it did not perform well. I then switched to an OS #8 plug and things improved dramatically. I used and APC 11x7 prop, the two plugs mentioned , and 56% nitro fuel.

Links to review articles:
https://sceptreflight.com/Model%20Eng...
https://sceptreflight.com/Model%20Eng...
https://sceptreflight.com/Model%20Eng...

Link to Engine Manuals:
https://drive.google.com/drive/folder...

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