hi-my 1st post and obviously a real noob question from someone that is gps/cell phone and compute challenged. Is there a reference somewhere that shows what cradle for what models will hold what gps's? Not sure if that came out right. Will the cradle for a nuvi 250 (the part between the gps and the ball) hold other models? Like the 750, or 350, etc.? The reason I am asking is I have a nuvi 750 gps and I have the suction cup qwith the ball on it that sticks to the windshield, but I need a new cradle. I can find cradles for th 250 really cheap but ther cradle listed for the 750 cost a lot more. I'd like to buy the cheapo cradle if it will hold my unit. thanks