Ok, the only information that is freely avalible on this technique is Semyon's Advanced Technique DVD and i think there's very good reason for that. The ROR associated with steering a 10 to the dealer is huge. If it goes wrong - and often even if it goes right, or nearly right - you'll end up with a lot of big bets out there facing a disadvantage. This means you need a huge bankroll to play and the swings can make counting's rollercoaster seem like a sunday drive.
Unlike steering an Ace there is no one best strategy for steering a 10 - it very much depends on the hands you have in front of you.
Often if you can you're better off steering the 10 onto one of your hands if a double down situation arrises (10 and 11's only) but then when using this technique properly you are going to leave the affore mentioned large bets out at a disadvantage doing this.
Steering tens to the dealer - well as with most steering techniques you need control over the whole table, but it does offer several oppertunites. You need to be very accurate with you cut. If you are out, you'll lose. If you are swithering between whether it was 52 or 53 - always go with the lower number. Your 10 turning up early is a a game killer, where as a late 10 leaves you more room to manouver.
Think of it like this - even as a second dealer hit card, the 10 carries an advantage in a lot of situations. If you miss the double you were targetting the 10 for, you can try and bust the dealer. If you miss the dealer, the first card dealt to 1st base should be a 10.
All this said, i would like to go back to the point i made at the start, that being that there's not much information out there on this, and for very good reason. My feeling is that this does not get much discussion because it was never particularly successful even for the people who were really good at it. It's a wonderful play on paper, but unfortunately that's where it stays wonderful. Semyon's team's success with this technique i think was greatly exagerated by Busting Vegas and his failure with it while SI was around pretty much directly contributed to SI collapsing. Alongside this, conditions today are different to those faced in the early 90'. More casinos are using a cut card to cover the back of the stack, so catching a glimps of the card is more difficult. Less casinos allow you to cut under a deck, meaning you have to be accurate at cutting larger packs etc etc.
RJT.