I purchased an AnyCubic Photon resin printer. The resin vat has a
groove on one corner to let you pour resin out, and while the top
surface is quite reasonable, the underside is not, so resin dribbles all
over the place.
I considered designing something to clip onto the vat to eliminate the
drips, but realized that I do not really know how to define that spout
shape. I suppose it would involve a sweep of some sort.