I would add that a former is needed just behind the canopy opening. I think the MTK had already posted this info.

My current thinking is that;

a) The rudder hinging needs to right on. If the hinge-pins show any form of side-flexing it could flutter. I have already swtiched to a "flat"
stern post, as shown above.

b) The "ladder" is needed to avoid compression and expansion of the rear fuselage sides. (At least behind the rear wing anti-rotation-pin-cross-tube up to the stab)

c) The extra former is needed to prevent fuselage twisting at the rear of the canopy.

If I pause for a moment of refelction, I would really ike to thank all of the conributors who have rasied all of these issues and the suggested fixes. This is the magic of RCU, (especially when you can post pictures). For those who have goine before we all benefit.

Thanks again matey's