I ran an AW hub with a 5 speed freewheel on it a while back. It was very cool to have done it, but after a short while, I abandoned it. It was truly the worst of both worlds. The simplicity of a 3 speed was ruined by adding a 5 speed cluster and derailleurs. The simplicity of a derailleur bike was ruined by adding a hub that weighs 117 pounds and has its well known quirks. The gear range had a tremendous amount of overlaps. My advice would be to either ride a derailleur bike or an internal hub. Don't combine the two.