It is a rare event that I can contribute anything you guys don't already know but at least for me this technique sped up ballasting about 4 times with better results. So here goes. I am at the stage of ballasting for the first time and it was going slowly. I was using the paper cup method and brushing then separately gluing between ties with a turkey baster. Very slow.
I took a funnel with a 1/4" opening and smoothly and quickly just poured it out. The funnel allowed a precise pour and very quickly! Tapped the rail a few times and then just poured glue quickly down the line from a restaurant style mustard bottle after spraying wet water. I used Brennans ballast and it was the perfect match for the opening size.