I made my own APTA, using some 1-1/2" aluminum tubing I already had, a couple of 1-1/2" galvanized plumbing nipples, a 1-1/2" galvanized cap and a Milwaukee BB2-100 1-1/2" butterfly valve. The butterfly valve is the key; the valve handle opens very smoothly, which improves your aim. A Schrader...