Sorry for the confusion, I use poser native units as my default display units, The .0096 is default 1" in poser 6.
You are welcome to use any node you wish as long as the end result is around 2" or as far away as required or desired, I think the subtract node is the most usefull math function so I tend to use it instead of add, multiply, divide or any other fixed value node.
There are many other ways of getting similar results, but this is the simplest and most effective way I could think of.
Thank you GBREAL for another good question.