That's right, John. The swings in Double Bonus are quite large. This is mainly due to the fact that the game pays the same for two pairs as for one pair. Over the long run, the much larger payouts for selected 4-of-a-kind hands balance this out but they may take several hours of play to even out. In any case, FP-Double Bonus is one of the few machines you can pay that has a positive expectation for the player if you play at a club that offers cash back for points.