Rv10 with a io540 I am installing a e mag the plane has electronic shower of sparks The instructions indicate to remove the shower of sparks concerns about a backfeed to the e mag I have called them and they cannot give me any real Scientific reason other than they had an initial problem with 2. Emags that had shower of sparks that failed looking at the wiring I can not see how that’s possible can anyone tell me a good reason why I should not keep the shower of sparks. *** Next what auto spark plugs have been used on a io540 with the e mag ?