Well as one or two of you have the 'newsouth performance indigo' boost gauges fitted i'm sure you will find as i did that the needle doesn't rest at zero

well T_J_G also asked me how i got mine sat at 'zero' and i found this which could be of use :
http://uk-mkvs.net/forums/p/128471/864415.aspx#864415 i used this earlier in the week and used a small thin blade screwdriver and lightly pressed the brass capillary tube 'past' the zero approx reading 2-3 psi started the engine let it settle and then turned off to check for sitting at zero if it was slightly out i re-adjusted to suit it took me 3 tries to get mine to sit at zero but it reads zero now

so hope this helps others out to