Now that you mention it....I DO remember a later version...but I have never seen one.
Please remember that I am talking about the earlier version.
The earlier version like I had DID have a symmetrical stab....I was talking about the ELEVATORS.
The elevators are supposed to be symmetrical as well....just like the stab...but the elevators were built on a flat surface.
Can't do that with a symmetrical airfoil.
This made the flat surface on the top of one side of the fuselage and flat on the other side.
This caused a severe trim (roll) problem which forced me to adjust one elevator up and the other elevator down until it flew correctly.
Eventually I got it trimmed so it flew with no aileron trim and generally I was happy with the way it handled.
Overall I was not thrilled with it but for SPA it was...well....ok.
I will say though....to get decent flight performance I had to use 30% Cool Power Heli fuel and a 14x8 APC prop.
The engine pulled that prop pretty well with that fuel....I was not looking for rpm....it needs torque to lug that prop....but the airplane liked it.
I mounted the engine inverted. This avoids the weight of the cylinder and muffler hanging off to one side causing trim problems.
The elevator push rod coupler was a 2 piece plastic block that was screwed together....provided with the airplane.
The lower block had holes where the L bends of the ele push rods (and short servo rod) were inserted....then the upper block was screwed on top which sandwiched the push rods.
It worked well....no slop.
The airplane was so easy to land...predictable.....slow and controllable....when properly balanced on the main gear with an empty tank.
Put a piece of coat hangar wire to conform around the bottom of the rudder and heavy duty Du-Bro pinned hinges to protect against dragging the rudder on landings.
It's possible to over-rotate it and drag the rudder on landing when slow because the gear could be a bit longer.
It flew sort of like an advanced trainer with a lot of power.
Most of the time I was trying to stay awake on the landings....HEH