<<<Also I'd like to hear of a source for the adjustable pressure regulator,
I believe Robert Lilly mentioned. >>>

CB Performance
1715 N. Farmersville Blvd. Farmersville CA 93223
(209)733-8222
1-800-274-8337
Contact- Baya

www.cbperformance.com

7161 Monza Series Pressure Regulator W 7mm Barb 79.95
Responds to vacuum changes better than stock to match change in vacuum
produced with MODIFIED duration in the camshaft

<<<As for the maintenance, is there a recommended way of inspecting these
things, or better yet bench testing them?  It seems to me that I heard
of VW of Canada not "guaranteeing" their motors if the owner didn't
replace the injectors.  Must be a reason.>>>

They can fail, clog and cause a cylinder to run lean, crack the tip...

Robert