Thanks guys. It dawned on me that the Xicoy LG-15 also implements the brake gyro functions so it would make sense to use the Xicoy for controlling the door, gear and brakes rather than the Mercury box. Agreed, using a flight gyro setup from someone else could be a problem as the servo particulars may not be the same. I hadn't thought of that.
flyloose: The factory had a standard purple one ready to go without a buyer I guess, or maybe a cancelled order. I had no choice of color but Dirk said it was available. My first choice was the standard red/white one but, like you, Dirk said it would be about three months wait. I jumped at the chance to take the purple one. I have the tracking information and it's on it way from China now.