Being the penny pincher that I am, I rummaged through the old shed today trying to find something to use as a flow restrictor. I recently had to buy a new parts kit for my deck/fence pressure sprayer, which came with several parts for sprayers that are not my model. I took one of the nozzles it came with and cut the end off to make a piece, which should work really nice. In customary fashion, here are a couple of pics:

