The trick with this machine is to keep your finger on the cancel button before spinning the reels. This will give you Skill Nudges every time! (If it has not been chipped). There is more...
When you bring in a win and exchange, look to see if the Donkey Kong logo is blue, if it is then you can empty the machine very quickly. Take the Jackpot. Never hold any numbers, just bring wins in from nudges. This is because the "Blue Mode" will not be de-activated until you get a full number trail! If you dont hold any numbers then when you exchange from a win the feature will still be Blue!
Of course, if this dosent happen you can still win a lot of money, but just not as quickly.