Good day everyone,
I have created a simple python addin which works in ArcMap. The addin has 4 buttons, two that execute script tools, two that execute models. The toolbox that the models & script tools are located in is stored in a network folder.

The buttons use pythonaddins.GPToolDialog() to execute a model/script tool stored on the network.
This simple diagram shows the layout:

My question is:
1. When a button is clicked on the addin on the local PC, where does the model or script execute?
2. Are there any risks if multiple PC's are accessing the toolbox on the network drive at the same time?
Thanks,
Chris