I have a Homelite 30cc on gas/glow. The glow portion of the fuel mix is Byrons 15/16 cut down with methanol to get 9.38% nitro and 10% oil. I'm now switching to 20/20 glow fuel cut in half with methanol to obtain 10/10. Here's my question. Will I notice a difference in the running of the engine since the nitro will go from 9.38% to 10%? Will I have to retune the engine with this little change in nitro percentage?

You shouldn't notice any difference, but I always re-tune my engines after any changes. I like the engine adjusted perfectly and do a quick check on the mixtures after prop changes, etc. Doesn't take much time...

AV8TOR