Yes, have pondered the larger snorkel myself. I don't know if it would make a difference or not though.

I fitted up a new piece of rubber in the wheel arch and no longer have a filthy engine bay all the time. Actually think that the water was being thrown up onto the thermo fan and then flung around everywhere. Much better now.

My main issue at the moment is still the temperature that the aux battery is getting to (48-49 degrees when touring and off-road). I am considering some custom exhaust mods and have been in touch with both Scotts Rods and Taipan about it. Both recommend a 3.5" mandrel bent setup, and Taipan were keen to ceramic coat it to assist with temps. At the end of the day though, I am probably better off moving the aux battery somewhere else and still need to give more thought to this.