Quote: ...in any case, in dealing with the parallax viewing issue, is there some method, formula or somesuch that would help me to overcome or minimize this issue?
I would agree with NorthernMonkey that parallax isn't really an issue unless shooting close, but if does bother you, or if you do want to use close-up lenses on it then there are two things you could do. One is to loook out for a device known as a paramender, which mounts between the camera and tripod head and enables you to quickly translate the camera through the necessary couple of inches or so to place the taking lens where the viewing lens was after composing and focusing.
The second is a simpler 'rough and ready' technique for manually coompensating, and that is simply to aim the viewing lens at a point exactly the right distance above where you really want the centre of the frame to be. Unless you're using really quite strong CU lenses it will probably be good enough.