I think Im ready to go now, 11am the next day. 2 hours labor at $75 per seems reasonable , but the new plug was $140 and of course that was full retail but even at Aircraft Spruce they are listed at $107 plus tax and shipping. I think the electrodes are made from angel hair, though they say "iridium" which is like platinum I think. And of course with the plane ready to fly now the weather is worse and even have an icing report at 16,000 ft right where I need to fly.