It does look good, but the mains are to far back. That's why it wants to nose over. []

In general you want the mains around 1 inch in front of the leading edge. When I say the "mains", I am talking about the axle being 1 inch in front. I did that with my LT-40 and have no problems with it wanting to nose over and ground handling is superb. I did use the same tailwheel you have and added a carbon control rod connected to the opposite side of the rudder servo from where the rudder is connected and exiting the fuselage on the opposite side of the fuse from where the control horn connection is on the rudder. Took about 3 hours to complete and works like a champ. I think the total cost for the control rod and tailwheel were around 20 dollars. Nylon rods work well and are cheaper but tend to change trim settings based on temp and humidity.