ORIGINAL: ttr125fan09
the only problem i can think of so far is that i don't know if the motor will come back to the neutral position when you let off
Probably won't, no.....
There is someting you can buy though that will center the steering automatically once you let go.
Saw it done on Scrapheap challenge (UK version of Junkyard Wars) when they RC'd a normal car using a motor form an electric wheelchair for steering servo.
Wouldn't have a clue what it's called though and I think it was pretty expensive too.