Signed.
It took me awhile to get the spinnerbox tourney items but other than that it wasn't too bad. The keystone strategy I used worked great.
Keystone strategy...
Start by max bets on 3 and 18 outside, then max bets across the bottom inside row (all the trips plus 3 and 18 inside).
Continue to repeat the inside bets until you score a triple or 10 and 11 pop up. If 10 and 11 pop up, cash out and try the tourney again.
If you score a triple you will be in an excellent position to simply run a safe bet strategy as follows.
Max bets on 10 and 11 outside, then max bets on inside 4 to 9 bar, the 12 to 17 bar, the Odd bar and the Even bar.
Repeat the inside bets above until 10 and 11 or 3 or 18 are hit.
Repeat the safe bet strategy until the end of the tourney. You win a Keystone Tourney and an item! With this method you should be able to place in the top 3 every time provided you score a triple on the first game.
FYI this is also the best way to get the achievement for winning a jackpot in Keystone as all Keystone tourneys are Jackpot tourneys.