Just buy mine for $200.
Built mine using one broadcast nozzle from Northern Tool. Easy build and no boom to catch on something.
Little update: Thanks for all the input. Took some of y'alls advice and ordered a new Fimco 2.4gpm pump and @Oklahomabassin recommendation and have a Black Rain sprayer head coming. Pump's installed and putting on the brass Y fitting with shutoffs on tomorrow. Need to get some additional 3/8" ID hose to go between the brass Y and the Sprayer head and should have it all ready to go next weekend. I'll report back once I use it.
