cool can you post a pic of the Vase? Id love to see it..
The dimentions shoud be absolute, They are often out by a 10 percent or so, but not 50 percent. The x and y dimentions that the laser moves in would become much smaller if you started your print with the print Base up Higher. The Height dimension that the resin moves needs tuning often , if your print is half as tall as it should be try doubling your drips Per mm.

A peristaltic pump will be a very nice addition , If you have an arduino controlling it and rotation sensor on the pump, then the pump can replace the dripper as well.