If you are going to do this, please don't scrimp and save on bits and fitting.
Speak to RobDon, JamieBennett81 and CSD_19
They have all fallen foul of doing it slightly on the cheap and with months of pain ended up spending money on the right set up with great results.
not worth saving a few hundred on a cheaper set up, do it right first time.
Speak to Bill @ Badger 5, he will let your see the TRUE cost of doing it right the first time.
Or you could spend thousands on doing it wrong the first time then right the second