I am now rooted with TWRP!
This reminds of the time I first flashed a motherboard BIOS on my first gaming PC when I was a teenager...I was crapping myself over the horror stories people told about failed flashes and bricked motherboards haha.
Same feeling really, once you've done it once it's all good.
I think I may leave the custom ROM's alone for the meantime, (not sure Cyanogen for example will even work on this phone/carrier) and just enjoy my root access.
Ace guide, and thanks for the reply Hadron!