I haven't done enough real world testing yet. I don't mind the internal Leslie (other than the roominess that I've already found a solution for), but I like having the control options w/L'otary. I'll see what engineers think this week. Either way, I will still continue to use L'otary on other sounds (which I've been doing a lot lately). I like the tube drive better, and I like how you can set the speed lever to any position in the middle to get a speed that isn't slow or fast. Great on Wurly, and gritty synth patches.