I flew my Zero 50 the past 2 weekends. Now have 3 flights on it. Mine has a ZDZ50 ng, robart retracts and struts. Weighs 20 lbs, 2 oz.... needed soome nose weight to balance and flys great at 155mm from leading edge of wing at root. This airplane flys as good as it looks. I was afraid of the 20 pound finished weight but as mentioned this airplane is a floater. It lands like a trainer and is rock solid. I set the elevator at 18mm up, 18mm down on high rate, 60% on low rate. First flight was on low rate but went to high rate and seems like 18mm is perfect. Aileron set at 12mm up and down on high rate, 60% low rate. For my taste I want to increase the aileron quite a bit more. Roll rate was a little slow for me... but 12mm is a good starting point. I set rudder to max left and right on high rate and 60% low rate. Vertical with the ZDZ 50 is excellent, much better than with a US 41. The ZDZ 50 swings a 22 x 10 Zinger Pro at about 7300 rpm....and pulls very hard!
Again this is a beautiful plane in the air, on the ground, and priced right too! I have photos I would be happy to send anyone interested.