not sure this is what you mean but you can pay it off early if you want. Doesn?t necessarily mean you will get it sooner but you can pay it off.
just go to the item in your orders section and click on item details and then select the pay remaining balance option..
Believe it or not a Sideshow rep said I couldn't move my final payment up to pay it off early. I didn't try the other option you mentioned but I think I will try that.