Too advanced for me there creamie.
I was simply adjusting mixture to achieve ideal egt figures based on >75% power and <75% power. Needle crafting was included to modify temps through the rpm range. It's not scientific and goes nowhere near LOP type discussions.
I proved (as the manufacturer said at the time) that adding fuel would be an expensive way to cool the engine and wouldn't work anyway. To richen the mixture from 20 to 28 lph has nil impact on CHT.
If we were talking figures closer to 18-19 lph then we would be talking more about LOP etc. I started well above this I suspect.
As for corresponding EGT's... The EGT's started high and gradually reduced as needle and main increased. Once you get too rich it's clear you are wasting fuel.
A $1000-$1500 investment in engine monitoring electronics is highly recommended.
Last check was 22lph. Without a TBI, LOP operations are just a dream.
Sunfish. Keeping head temps low is the solution, not fitting a gasket which will simply mask the problem.