USB Joystick calibration

Hello dear mac users!

I'm studying computer science (embedded stuff specifically) and I recently made a HID compliant USB joystick, that uses pretty generic descriptors. It consists of two accelerometors, a programmable system on a chip and an rf transmitter and reciever. It's basically a wireless joystick that responds when you tilt it.

Now my problem is that on Windows side it works perfectly, but on OS X side I don't even know where to begin calibrating etc it. I want to be able to demonstrate it by playing neverball. It acts all funny on OS X side. Like it's super sensitive and the axis are all inverted and since there is not a similar calibration tool on OS X side I dunno what to do at this point.

I am a fairly bright guy, so if someone would just point me in the right direction, I'd appreciate it a bunch!