Build and quality already discussed so won't repeat. I have this plane with a RCGF 21cc twin cylinder gas engine turning a 16-8 prop. This setup just looks right and it flies even better. Have had it for over a year and have lost count of the number of flights but it's a ton and no malfunctions of the airframe at all. Have worn out several tailwheels and one set of maingear wheels (I fly off a paved runway - hard on tires) . During build I reinforced the wing saddle area and I epoxy coated the firewall as well as made a belly plate out of 1/4" ply stretching from the firewall back about 10" which I bolted the landing gear to.
Many, many ton-of-bricks type landings later it's still as sturdy as day one. Program flaperons to make even better landings. Do these simple mods on initial build and you've got one tough bird that's just plain fun to fly.