Logitech Driving Force GT, 900 degree switch?

My Logitech Driving Force Pro, seems to have seen it's better days, so am wondering if i should buy the GT.

So i got a few questions about it, the GT is working nicely with GT5 or? And can you switch the 900 degree turn on and off? My Pro wheel have a tendency to swing left and right, which just get's worse as the speed get's higher, and its impossible to "stop" it, it's like driving irl with wheels that are out of balance, badly, hopefully this is just my Pro wheel that is a bit damaged, or is this how it's supposed to be? Also the lock for the 900 degree is stuck on my Pro wheel, so i only get 200 degree steering, which is kinda nice, i know you could switch it on the Pro, but my wheel is a bit damaged as i mentioned above.

That's it i believe, hopefully someone with the GT wheel can share a bit of their experience with the wheel in GT5, and thanks in advance =)

Looks to be something wrong with my wheel, have just tested the Logitech Driving Force GT, and it feels alot smoother, and the swining from right to left didn't seem to occour at all.

So it looks like i'll have to buy a Logitech Driving Force GT =)

Just a heads up, there is no 200 degree switch on the GT.

Hmm, well does that affect the gameplay in any way, like some cars, maybe f1 cars are really hard to drive with the GT wheel?