So it would be (top to bottom): PB4-AS plate-AS clamp-newport adapter-Newport430?
Yes, that is correct. If you were using an AS clamp outfitted tripod head the addition of an AS plate to the base of the Newport stage would complete the adaptation.
Also need to clarify, do you have the M-430 (M=
metric) or the 430? Do 1/4-20 screws attach to the stage without any problem?
The Hejnar Photo adapter plate is compatible with most Newport stages. The important feature to note is the center distance between holes. Those distances do not change with Newport's lineup. All such stages I own have a large number of holes spaced @ 1" centers to oneanother.
http://www.hejnarphoto.com/ebay/picture ... rawing.jpg
The reason I mention that particular AS plate is it will fit the PB-4, has a ridge for 'anti twist' and is bidirectional.
You may need shorter screws when attaching the Hejnar Photo Newport adapter to the 430. Some of the Newport stages including those that use cross rollar bearings as opposed to ballbearings do not have sufficient depth of thread for attaching the adapter using the screws that come supplied. You would need shorter screws. The depth of the threaded hole is easily measured by putting a match in the hole, marking the depth on the match and then measuring. Add a few mm for the adapter plate. Hejnar Photo can supply screws compatible with your Newport Stage.
If ordering the AS clamp, ask the seller about the screws which come supplied with the AS clamp. You need all three screws, not just the center 1/4-20.
Craig