I am not real sure , but to me 30% nitro is high. I don't have that large of a saito, my largest is about .90 and I run 10 to 15 % nitro. don't know if that would cause a glow plug issue.

I will be watching to see if there is any more input on the 30 % nitro, as saito is about the only 4 cycle I own.

sticks