Yes. I do have two 7.2 packs in the boat.
I tried a couple different props other than stock. I had to buy a different drive shaft and cut it to length. Both of the other props were too much prop for the boat. It could not turn enough rpm with them. I feel that the submerged drive must make the props much harder to turn. The boat also did not turn well with the larger aggressive props.
I I ended up going back to stock.