Pook Mike, Bill and anyone else that wants to chime into this long lasting thread, welcome.
Pook, I really like your balancing machine. Now thats what I call perfect CG balance. Very nice work. As for the weight, I thought mine was heavy @ 7 lbs. 14 oz., which is pretty close to 8 lbs. Joe would be the better one to respond to this. he hates weight...

I am using a 14/6 APC prop on mine and I have no problems. I can take off in about 15 to 20 feet and go vertical and just keep on going unlimited.
I learned today that four others in the club have ordered UCD's. We will soon have a squadron in the air. A few others are interested as well. Hard to hold a good product down. Like I have said, I enjoy flying this airplane more than any other that I have in the hanger. Just a fun plane to fly when you just want to fly and not think about anything else.