My hearing is shoot after career in Infantry. To properly tune low end on a Zen G-26 the experts give a technique of using tack but must get consistent readings to work. Not what the exact RPM is but when it tops out. Same with setting a stubborn Saito 100 on low end for war bird.
I was on the thought process of getting direct in sun. On painting prop will relook that or even try to use white chalk as temp measure. Doing my tuning at field.
Thanks for input