My wife makes mosaic pins. She does them in batches of 30 or more at a time. We use West System and the slow catalyst. That resolves the heat problem Tracy mentioned. It's an overnight cure, but with few problems.
A vacuum pump beats anything else we have found hands down. I built a manifold for different tube sizes, from 1/8 to 3/8. The epoxy is drawn up from a container, through the pin, then the plastic tube is cut off, the bottom plugged, and it's set aside to dry.
I built a "lazy susan" to put the pins in so they are vertical. With some epoxy in the top tube, any voids can draw some back down. She gets very few voids.
Gene