Yonkers, from what I have heard and personal experience, Momentum is not very sharp. Basically my father tried to buy my mothers 5 series from there and they ordered her car but somehow it never came or was the order form ever found again. Weird? LOL so thats all I have to say about Momentum. As far as changing my order I pray that I am in the same boat as you right now
1st week of March for production would not be bad at all.