Prior to installing the Aileron CA hinges in the wing, a hobby knife was used to dig out the wood shavings that are left over from the notching process at the factory. I do the same to the aileron too. After this, the CA hinges just slide right in without a battle.
You can use a covering iron to ensure that the covering was free of wrinkles on the soon-to-be-inaccessable hinge area prior to installing the aileron.
I also used some tee pins to align the hinges prior to gluing.
