I noticed an A10-4T engine today had a larger diameter nozzle that all the others and the igniter plug fell out, so jammed tissue paper in. The engine was placed in my mini stealth (awesome flier) and it flew like it was shot out of a cannon! NONE of the other engine exhibited the behavior on both 1/4 A10 or 1/4 A3. Strange. Thought it was worth sharing, maybe nothing seeing that it did not blow out the nozzle.