I have no leaks with a genuine Rev D. It holds 30psi just fine. Maybe the pattern ones are pants, but certainly VW sourced ones don't leak in my ED30
![Smiley :smiley:](https://www.mk5golfgti.co.uk/forum/Smileys/newsmileys/smiley.gif)
I was having some weird part throttle surging problems with the GFB DV+. It could be a byproduct of such a high state of tune, but the Rev D sorted all that.