this is some fantastic information from you guys. i've been running the cheap tower hobbies glow plugs..( $2.99) and so far have had no troubles but am leaning toward swapping them all out with the os 8. i'm thinking it'd be good to catch a problem before it starts. again...thanks for the "great info"... now.....whats the fastest way to remove ten inches of new snow from your flying field....lol have a great day guys