Thanks for the replies :)

Many good comments to take into account ;)

So to down tune to say, Drop C I realistically need to increase string guage (currently strung with 0.09-0.42) then adjust the floating bridge and also adjust the action. That is a little more than I anticipated would be required.

You mentioned that specialist pickups are usually required? Would these be actives pickups like EMG's for instance?

Maybe initially i should go for a lesser down tuned setup such as drop D until I master the playing techique.

I have been practicing palm mutting and various picking styles, Are there any lessons that cover the "chugging" type metal rhythm that you hear in most of their (and other artists) tracks and any other typical sounds that this gendre are based upon?

I would say my main influences would be Slipknot, Korn, Pantera, System of a Down, QOTSA, but to name a few.

Thanks!