Nice to see the history. Did the construction method evolve much from the earlier model to the twin tail version?
Looking to the construction method itself, there is not too much evolution.
Many minor changes used; some of them approved, some will be abandoned. In details:
2000 year model was esthetically inspired by Yak-9 fighter, the 2012 year model was inspired by Swiss Air Force C-3603-1, and the wing of Caudron-Renault CR-714.
The 2000 model's central wing & fuselage part was integrated (made of one piece of foam: the two half-sections contained a big, 1,5mm thick plywood rib, what is holding the mount of the bellcrank.) It was too much "sculpturing" work to make.
The 2012 model has a conventional "plug thru" wing (see the photoalbum), built more simple, and the plywood template set can be used again.
The 2000 model's complete nose mounted to rear parts like a torpedo-junction (6 pcs of M3 metric bolts, in 20° sloped position, and the primitive " A " shaped 3 mm dia musicwire landing gear holt by the double plywood full ribs. (I have 2: one shorter for asphalt, one longer, with larger dia wheels for lawn. )
The 2012 model has wing-mounted landing gear (see pictures in album). The plywood "pockets" worked well for round ten years.
I will keep this arrangement in the future, the reason is simply that in the '60s, in my childhood, the "Big Boys" used that, and the fuselage mounted "trestle" shape considered naff.
As a "wooden handed" pilot, I use exponential control mechanism, since 1987.
In 2000 model the expo-crank is integrated into the bellcrank, and works well, but practically not adjustable. (Just the pushrod's length is adjustable, thru a small hole, below the horizontal stab. )
The 2012 model has far freely adjustable, both by opening the canopy, and by the (short) fuselage's end. (Some say it is 'not elegant', but, when Wilga, or Foka Standard satisfied this, me too...
)
One is certain: my next model will enjoy all-parameters-adjustable control system: I have no time in this life to try/taste all my inventions...
Sorry for Lev Tolstoy -long answer
Istvan
PS. one good news: I found two proper epoxies for work, in small outfit, which ones can substitute the too professional LY-5052...