I understand programing verry well what I dont understand is why there is no complete and accurate manual the update on horizons site tells you the steps that you should follow. The manual shiped with the engine was wrong the function of the led was described in the original manual and on the horizon site do not explain what the lite fuction is during normal operation as i stated before i get 3 short and one longer flash as the ignition is first turned on. I would love to know if others with the short Pitts style programing get the same light flashes as i am and what flashes people get on the long style programing. Ive attached a screen shot of the description that is in the manual available from horizon I however have never seen the patterns described. IT is my guess that they are omitting the 3 short flashes as im sure the longer flash im getting isnt as long as the long silencer indicated in the photo. Im going to assume that a long silencer progamed ignition would have 3 short and one longer flash equal to about 4 of the shorter ones as indicated in the manual photo