Mission, we have an anomaly on the Harley's. It has to do with the frequency of catching the mega free spins. I've collected a lot of stats on the HD's. Here are some of the frequencies I came up with:

1. Frequency of Bonus/Bonus landing on the 1st and 3rd reels is 13.
2. Frequency of mini symbol landing on 5th reel is 17
3. Frequency of maxi symbol landing on 5th reel is 52
4. Frequency of mega symbol landing on 5th reel is 92

Using my stats I initially put the frequency of catching the mini freespins at 221, maxi 661, mega 1157. My actual results on the machines were very close on the mini and maxi but not even close on the mega. I was averaging over 2400 spins per mega hit. And everyone else was having the same result. Then someone put up the par sheet numbers on twitter:

mini = 220
maxi = 675
mega = 2553

So I had come up with accurate numbers for the mini and maxi frequencies but the same methodology didn't work for the mega. It's an anomaly I can't explain.