FWIW, I was very close to ordering this 6" pry bar for my Fatboy. The size works out because the Fatboy is only 6" tall.
However, I just got my shipment notice for my Maxpedition Jumbo which is 9". I stopped by my local hardware chain (Lowes) and picked up a fairly lightwight 9" bar.
Hopefully it fits well, bit it looks like a pretty good tool (better than the Bug Out Bar) and was only $13 (the Bug Out Bar is $70). It has the same shape as the Ti bar I mentioned, above - just smaller and steel instead of Ti.
So, it looks like the Bug Out Bar is about as big of a pry tool as you can fit into a Fatboy, but the 9" bar should fit in the Jumbo.
-john