rinagi,
Yo bro, u r a evo owner now?? Mmm... Knowing tht u r an Altezza owner b4... Anyway, welcome to u!!!
Myself using GReddy Profec B II n yes its a dual soleniod boost controller... So far so good... Currently boosting Low 1.2 n High 1.4 bar... Tested @ 1.6 bar b4 too... It prevent boost spike n maintaining de boost tht I set, very well...
I think HKS EVC bc is 1 of de best ard... For ppl hving problem with it is mainly due to setting problem if am not wrong as i know de EVC bc can hv a very detail setting n very good for those big modding car... Or in short, its a bit complecated, cos it have lotsa functions as far as i know, such as hving diff boost setting at each gear... So need a very good tuner for it!