[mikets]

Why do you need to rebuild WPILib unless you want to modify it? I keep my own copy of the WPILib sources too but for reference only. I did find some scenarios that I need to change the lib but I managed to do it without changing their sources. I either create a new object that inherits the WPILib object and overrides what I need to modify or I just make a copy of the source file and make it part of my project.