I had these blue CA hinges supplied, looked like cut from a big sheet of something as
they were not uniform.
I used Robart hinge points for the elevator and rudder, LHS ran out of hinge points
so I used the CA type hinges for the aeileirons, four per side.
They seemed to work OK
I cut the slots about 1/4 below the top and sealed afterwards with clear Monokote
on the bottom of each surface for better response. I think it is more linear with the hinge lines sealed