Filament consumes the same footprint no matter where you put it. The one thing that I'd recommend against is mounting it to the top of your printer. A lot of momentum is transferred from its motion as the X-Carriage changes direction. The more stable the frame is around the print, the better the print. Having 2 lbs. shimmying around above the printer will just increase inaccuracies in prints. You may not notice is on large prints or at really slow print speeds, but once you get the print speeds up, you'll start to see shake.