I don't know if i am the only one, but I find the prices quoted for fitting etc.. from these places are crazy. I know this is different for different people however when i was charging my car, (like many people) I had the majority of supporting mods done. Kpro, 3" exhaust, Manifold, RBC etc... Granted these are probably 2k worth of stuff but basically all i was missing was Charger, Injectors and intercooler / piping. I also find 3k for the brakes excessive, but i have never looked into that, i am just assuming you could put the kit together yourself for a lot less. Just my opinion, i may be corrected on that one.
So I looked online and bought the Rotrex bracket, Rotrex charger, rotrex oil ( universal filter, lines and reservoir) , mishimoto intercooler, Bosch injectors and a second hand impreza intercooler piping kit. This cost me about €1,800. Fitting is about 1 days work (if you know what you are doing). That is a basic cost for just the charger kit bought and fitted, about £1500 at the current exchange rate which would be a lot less a few months ago. I find it crazy people quote £4.5k for a charger kit.
I have spoken to someone who has gone through 3 rotrex chargers. I was asking him about his pulley ratio and crank size compared to his RPM limiter. Guess what the answer was? Here is the reply, and i quote "Huh? what do you mean?" and that is why he has been through 3 chargers. Do your research, set your RPM right according to the max rpm of the charger, run your oil lines in a safe place I cant see how anything can go wrong?? Give this info to your tuner and get a good map. The map was 500 for me.
Also I was not a whiz kid around the car. The most I had ever done when I decided to do this was probably servicing the car. It is just bolts. All you have to do is remember what bolt came from where to get it back together, its not rocket science. If you are considering paying 4.5K why not do it yourself, if you f**k it up a new engine is 1.5k anyway may as well chance it yourself and try save a few K. That was my theory anyway and 4 years later still running like the day I got it mapped