I have the Rat 2 (Aus 8) and an Esee Zancudo. I like the Zancudo better, so I scalloped that with an inexpensive Jewelers file from HD. The downside is that the handle width is thinner.
I know a lot of people prefer the Rat 2, but I just don't like the feel in hand. I similarly don't like the mini grip feel and prefer the full size. For the 3 inch blades, I prefer the LM Crater, BM mini BC, BM mini Presidio 2, and the Buck 112 (currently waiting on the 112 LT due out this summer). BTW, the brass/wood on the 110/112 is easy to Dremel and polish to your shape and liking. Also props to the Opinel #8 and#9 which is also easily sanded/ground for a custom grip.
I don't know if the plastic on the Rat 2 is the same on the Esee, but if so, it files a little messy. It works fine though, although the cleaner SS frame scallops I filed on the lock side probably make the plastic scallops seem messier in comparison.
I have a second Zancudo which I haven't scalloped yet, but I always grab the scalloped one when I want to carry that model.