For taking out a corner when its already inserted, its hard to explain, but there is a easy trick if your edge is oriented properly. Place a correctly oriented edge on the R side, sexy to pull out the corner and push the U' a little bit further to perform a U2 and RUR' to make the pair, U2 RU'R'. so the "alg" is R U R' U2' (when you perform the sexy move your left hand index finger is on the front left. push your index finger all the way to the front right) R U R' U2 R U' R'. If the edge is unoriented properly, then do almost the same thing with the sexy U2 thing, R U' R' U cube rotate and L' U' L to insert. so the alg is R U R' U2 R U' R' U y L' U' L. I think its good to know the good case, but the bad case I perform as the beginner method where I pull the corner out and pair it by flipping the corner onto the edge and cube rotating to insert. it all depends on if i recognize that the corner is properly oriented or not, its habit to pull out corners from the slot, regardless of wether i can make an easy pair or not.
Also, again... stop making threads