Whats wrong with a standard current revision replacement?
Each to their own - what's your preference?
Currently rocking a 'E' Revision.
Dont see why I should pay 3x as more for a OLDER valve than I would for the latest valve VW produce.
Since there is only 1 part that controls boost that can be modified, ie duty cycle, id much rather adjust that for more relaible boost than stick a slower valve in to create a spike in spool.
Surely there must be some reason you prefer a older valve? Why not map the ECU to the latest, more reliable valve?