How do you prepare an ARF's CA hinge slots (U Can Do 46) to accept flat nylon hinges (dubro)? any difference between preparing the slots in the wing and the aileron itself? IS there any beveling needed here, and what does it do?

I'm afraid that if I just chop out the wood it'll be uneven from slot to slot -- maybe one hinge winds up a little high at one slot and a little low at another slot. Do you take one slice off the top of the slot and then one slice off the bottom to keep it even? those aileron's are usually not too thick.

Sorry on making a fuss about what is simple to many of you -- I just don't get this, maybe it should be asked in the BEginner's forum. (I can't use CA so this is a gating item for me in assembling ARFs -- up to now I've just asked friends to CA the CA hinges for me, but I want to do the hinging myself from now on.)