I drilled a hole in the end of the elevator to see how the internal structure was.
There is not a wire axe like rudder. There are 3 hinges (like Robat 310 hinge) and it is impossible to disassemble elevator-stab system.
Then I bended a 2 mm wire and sharpened its bended tip and reached to the epoxy residues through the hole in the elevator internally and,
through the gab between stab and elevator. I took two days to clean them !
Now elevator can go 25-26 mm downward. I hope it will be enough for snap and spin.
Also I wrote to Comp ARF.