OK ALL YOU GUYS,,,,,,I flew my GP X-300 today with the taurus 52 and a new sensor on the ignition. The engine started on the first flip(with the choke closed) and on the second flip(with the choke open). NO PROBLEMS AT ALL....Everything worked liked it was supposed to work. I must say that Bill at Taurus is just about the best person to work with that I had met. Now I must add Bill and Terry at CH Electronics. Without Bill and Terry at CH testing and putting my ignition in a plane and flying it, I would still be trying to figure out the problem. I guess that the SENSOR can work intermitten.....NOT just either work or not work.....Now I have purchased a testor which is sold by CH and will be able to check out the ignition and other problems should they arise. I really appreciate all the comment you guys provided and let me say that if you supect a problem with the ignition, give Bill or Terry a call or send in the ignition for a test. THEY will fix and get it back to you in a hurry.