Yeah, those will do. Use the metal retainers for flight. The plastic ones IMO don't hold as well but can be used during setup until you figure out exactly which servo arm hole you are going to use.

Ailerons? I assume you are talking about the hinges. Give them a fairly firm pull and if them don't pull out they should be OK. It's not uncommon for manuals to be outdated by production. They probably printed a 1000 manuals and then changed production methods. No sense throwing out a manual over a small item although they COULD have included an update flyer fairly easily.