Mate, until last night I'd never taken an aeg to bits.. Yes when I put it back together I had a couple of "spare" bits but a quick post on here and I had it sorted straight away.
I've re built engines etc so I'm pretty handy with spammers etc which helps but aeg's are so simple things inside.
Get it pulled to bits, take pics at every step lay all the pits in white paper in the order they came off, number them, count how many shims went here and how many went there and you shouldn't go to wrong.
Also find a guide on YouTube too, that helps.
It's quite satisfying fixing your gun yourself 👍