My scroll wheel on this model is also not functioning well now, so I was going to see if the original software or drivers (or updates) had something in them to calibrate the wheel. Sadly, I cannot find the original software--possibly because I threw it away thinking most companies now have their software and drivers uploaded to their website--not Razer apparently.
Where is the software and drivers for this model, and why is it not uploaded to your website? If I cannot at least try to calibrate the wheel on this thing before I trash it, I will not be buying another Razer product, I assure you.