What if you used a pump like this. http://www.ebay.com/itm/6v-dc-Dosing...item2ed1c1d0d1
You can reverse the direction. Pump in some water, pump out some of it, and repeat. You can raise the resin over the print and back down. All it takes is a little attiny85/45 or something, which are a dollar or two, and a small H-bridge chip. You could integrate it into your board fairly cheaply, or let people use an arduino or similar. This would solve your drip inconsistency, as well as a number of other problems.