All good mate but how much do you value your time? Option 1 buy name brand surge costs you say $800 and instructions to fit, even someone that isnt mechanically minded fits it in an hour or so. Option 2 you go spend hours finding un named parts that cost you say $500 then you spend a day putting it together and fitting it whilst ducking off to the shops to pick up the parts you have forgotten, a bit of a hastle but you would have a good feeling of accomplishment. Personally for the sake of a few hundred dollars I like Option 1, the time and headaches I saved fitting option 1 I could have put in a days overtime, played with kids (if you got them) or had a heap of beers.