I kind of regret not carrying on with Bucket Loads when I got that cash stack starting at £5, could have been a JPT in it for me (I got the bonus with numberless fruits though, so I took the £5 and scarpered), was just being a bit paranoid that I'd get a reel sync problem, like the time I got killed going lower than a 12 on Most Daunting.
But well done all the same for getting your JPT.
There's only a few things you need to watch for when playing Extremes.
Mystery square on the board is nearly always a Lose or Roll Even.
(but that's just my experience, never ever rolled even on these)
Be careful with the hi-lo gamble as Extremes tend to kill frequently on a 2 or an 11.
(same can be said for any machine really, but it's usually alright to do it on the first gamble though)
Keep hammering that Resucitate (or equivalent) button when you lose, you might get back on the board.
(I had a D&N do it almost every board once)
Cash stack starting at £5 upwards is a good sign, it may be a Jackpot board.
One last thing is Extreme machines can give good wins during reel play.
(unlike most machines that only tend to spin in the cherry or mixed bars for 50p/£1 etc.)