Thanks for the call Bill. I knew it was me that was committing the error, not the Twinsync. I guess I hadn't read carefully enough to know that each of the green lights is supposed to come on as a magnet passes by the corresponding sensor. One of the sensors wasn't picking up the magnet (i.e. no green light), so I flipped it over and presto, it got a reading (green light came on). What I had thought was synchronization before was really just nothing, coincidence that the motors were running relatively near each other. Now it is perfectly synced up and the dead stick feature works fine, I tested it with either engine. Great product, and even better technical support!

Can't wait to get that bird in the air and hear those motors doppler by.