I have received some feedback from my readers regarding my first usb gamepad project , so for the past few weeks I was working on a new imrpoved design.    There are plenty of new improvements that I hope will address many of your requests. The new device supports a wide range of gyroscopes and accelerometers that can be configured using  Configuration Utility for Windows. Have a look at this article as it features new suggested schematics as well as a full feature log. Firmware and configuration utility are free to download for private use.