Peristaltic pump for single 28BYJ-48 stepper motor.

WARNING: I have made significant imporments to this pump. Found here http://www.thingiverse.com/thing:803035

Simple pump and casing for stepper driver. Designed as a drip pump for adjusting PH in hydroponic system. Good thing because all it can manage is a drip. I'm using a 5v 28BYJ-48, the ULN2003 driver board that it came with and powering it through an arduino. (http://www.amazon.com/gp/product/B0089JV2OM/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1). I designed the pump around 1/1