So the missus bought one of the Planet X Reverbs from the PSA last week.
Just come to fit it (typical, 7.30pm the day before a ride), and it returns stupidly quickly - way faster than my (8 month old) one; and with a hell of a bang. I'm not sure if the speed control is working - it might be slowing things down fractionally, but at it's slowest it could still launch you into orbit....
Google has loads of stuff about slow Reverbs but not about overly fast ones.
Air pressure is about right - 220psi.
If it's a simple fix, then I'll crack on, but other wise it'll have to go back, which is a proper PITA.