I had both, bought the Bailey first then threw it away and bought the forge when the Baily DV began to leak.....hard lesson at £100 a pop......it also ruined a RR day for me so that should be added to the bill too..........
 
my bailey valve isnt a dump valve but it does make a slight schhhhhh when you lift off...not sure which model it is but its chrome ...will this have a piston or diaphram?
 
Ive had a bailey dv30 on for over 3 years now and its still working as good as new, no problems at all and loud too.
If i was to replace it though id go for forge now as its cheaper, think the bailey goes for something like £110-120 now.
 
i had both, and had no problems with either. the only diff i noticed was that you can change the spring on forge.
the baileys one felt heavier only by little, and was slightly bigger.
 
so the baileys dv30 is the one to go??? has ne1 tried fitin it on the cold side?? using the intercooler pipe for colder air?? heard that works allot beter because its colder air going in to it??