One for the HKS boys

[eyedee]

Hi,
I installed an HKS Super Sequential blow off valve to my Twin turbo Type R about 8 weeks ago.  The instructions were in Japanese and so a friend translated them, and they said the bolt on the rear of the unit is set to the left for shipping and you must turn it right (but not too much) to loosen it for use.  I did all this and it was working finr until Saturday when I put the power down (not that aggresively) and the valve seems to have blown.  It doesnt hold compression and wheezes all the time, so obviously the turbos wont spin up.  I tries readjusting the bolt but its no good, I think the valves blown.  
Question is, does anyone know how far to the right I should have turned the bolt?  Or am I wrong and the translation was incorrect?  I know Clive and a few others have these fitted to your RX-7\'s so I assume they can handle the power fine (mines running standard boost).
Any help would be appreciated.
cheers guys