I got a ridiculously good price on a hog switchback 2nd stage from DRIS recently. During my initial inspection I noticed that the backing of the diaphragm has changed from metal (as on my original hog 2nd) to a black plastic backing. Is this unique to the switchback, or do all diaphragms now have black plastic backing?
I was always impressed with the metal back. What is the reason for the switch?
I was always impressed with the metal back. What is the reason for the switch?