This spru cutter absolutely the best tool for removing the nibs left from the supports. Get it from MicroMark now. Hopefully it will be available at the Form store in the future.
That looks sweet for cleaning up the little stubs left over after snapping off the supports. I’m building small enclosures for circuit boards (5"x 3" boxes), and the forest of supports gets more and more difficult to snap off as I work my way to the point where the part is closest to the base. A right-angle version of this would be nice, but something that had a very thin working end (like needle-nose pliers) with that cutting tip parallel to the long axis of the tool would be perfect.
Also check out cuticle nippers! There are many different sizes and angles around. You can even find them in most grocery and drug stores (in the nail section)! Usually around $10ish