Bought a cheap one years ago, it wouldn't boost above 1 bar so bought a Tial, under 1 bar it was spot on, I gave it to a mate to use! he had no problems apart from the diaphragm burst eventually.
thought about doing it a few times, even bought a type r as a donor car but ended up using it a a daily There is a kp starlet running a s2000 engine kicking around somewhere