Hmmm.. deja vu .. this is what I'm just starting to make.. though mine will be bigger.
This will certainly be good for Nate, that topsoil in his basement is absolutely brutal when it's dried out!!! Can't play for more than 20mins & you start inhaling that $#!&!!
Did you drill holes in the spray bar? I was thinking of making a slit in the tube with dremel cutting disc, kinda like spray nozzle tip so the spray pattern fans out in a mist.