the 2 quotes are refering to the same thing, basically putting a pressure regulating valve in line from the compressor to th wastegate.
the site i quoted has now chamged the article into a pay only bit, ive noticed, it went into detail a few weeks ago on building it, and setting it up with a check valve, and pressure relief valve fo rthe anti creep.
Cheers dave, so do you just put the pressure regulating valve inline (to replace the amal) and thats it?, or is there more too it? The article looks like they employ 2 valves??