So I'm finally getting around to doing this, and holy moly that tube is gunked up bad! At the very end it's probably half the diameter it should be and I can't get the trombone cleaner in it at all. I'll have to see if I can fashion some long pick of some sort (why don't they make wire hangars anymore?!?!?). A question though, does anybody know what the hole on the upper right side of the throttle body is meant for? The gasket on mine is blocked, though it looks like it can be punched out, the hole on the throttle body had a bunch of carbon build up on it already I guess from blow-back. I'll include some photos: