Over the winter I'm looking to put together a skid sprayer. I'm mainly into mowing, but I am planning on getting my license this winter and have a few accounts I can pick up with hopes of adding more. I'm looking to spray possibly some pre, but mainly post emergent on fescue lawns. I'm hoping to put together a 100-200 gallon system and looking to spray in the 1.5 to 3 gallon per minute range. I'm thinking a 6.5/gear reduction engine coupled to a roller pump w/300' 3/8 hose and a chem lawn type gun. At this point I can't justify the cost of a diaphragm and I am not sure I need the pressure anyway. My question(s) are in regards to the plumbing of the system. Below is what I have in mind, please offer any ideas of advice you have. 3/4" from tank to strainer, 3/4" from strainer to pump, 3/4" line to 3/4" tee, 3/4" tee inlet, one leg of tee reduced to 1/2" back to tank with ball valve for bypass, other leg of tee 3/4" to pressure regulator, 3/4" pressure regulator inlet, regulator outlet reduced to 3/8" to hose reel. Again, any advice on this set up will be greatly appreciated.