Ive only got good things to say abt mine too. It was easy to install, & I was immediately very impressed with the unit in my v6 BA astina. Only other mod at the time was CAI.
As well as performance in power & response, i found that it made the car sound a bit more beasty too
The trial-and-error approach to setting the guage pressure is interesting, but some guidance would've been good.
For reference, according to the mazda manuals section on testing the fuel regulator, the pressure going into the stock regulator should be :
4cyl BA -
200-240 kPa { 2.0-2.4 kgf/cm² , 29-34 psi }
6cyl BA -
210-240 kPa { 2.1-2.5 kgf/cm² , 30-35 psi }
and with the vacuum hose removed :
4cyl & 6cyl BA -
280-310 kPa { 2.8-3.2 kgf/cm² , 40-45 psi }
i dunno if thats of any use to ppl, or how accurately it reflects against the psi shown on the FSE PBV ...
Dave