Really some quick problems regarding certain sleights.
1) My retention vanish (1st version) from Roth's Expert Coin Magic looks, for the lack of a better term, very hands-y. As in, the retention itself works, but it looks pretty clear that I did ''something'' when I withdraw my right hand from the closed left hand.
2) In that same sleight, I know the popping of the knuckle of the first finger is a no-no, but if I extend the second and third fingers, their knuckles straighten out. Is that a problem?
3) Is the Roth Palm Switch good better than the One-Handed Switch in Bobo's?
4) I have those two books on coin magic. Is there an absolutely (or for the most part) invisible single coin switch?
5) There are two billet switches in Annemann's Practical Mental Magic. Are the absolutely invisible or HAVE to be hidden under in-transit actions?
6) Finally, which billet switch is the better one in that book? The first or the second (Annemann's own creation) one?
I'll appreciate any help at all!
Thanks in advance...

1) My retention vanish (1st version) from Roth's Expert Coin Magic looks, for the lack of a better term, very hands-y. As in, the retention itself works, but it looks pretty clear that I did ''something'' when I withdraw my right hand from the closed left hand.
2) In that same sleight, I know the popping of the knuckle of the first finger is a no-no, but if I extend the second and third fingers, their knuckles straighten out. Is that a problem?
3) Is the Roth Palm Switch good better than the One-Handed Switch in Bobo's?
4) I have those two books on coin magic. Is there an absolutely (or for the most part) invisible single coin switch?
5) There are two billet switches in Annemann's Practical Mental Magic. Are the absolutely invisible or HAVE to be hidden under in-transit actions?
6) Finally, which billet switch is the better one in that book? The first or the second (Annemann's own creation) one?
I'll appreciate any help at all!
Thanks in advance...