Yeah mate I'v got one and never had any problems with it, Mine boosts to 1.7 bar and settles to 1.5 bar and it hold's the boost.
If you pull the pipe off the FPR and put the T peice on it with about 2" of your other pipe going to the FPR you wont have to cut the O/E pipe, so you can put it back if it dont work, I'v got a picture somewhere.