I did as you have when I first started food plots. After hitting a few trees with the fold out booms, and having to repair them, they got so bad that there was no way to fix them without replacing them. Then while at the local farm supply I found out about the boom less sprayers and could not see spending the $$$ for all the parts when I could buy the new 60 Gal. sprayer for a few dollars more. It was all put together and only needed to have a few bolts tightened an the spray tips set for the width and coverage I wanted. Fimco also makes one that is only a 40 Gal. tank 3 point setup like mine, if one dose not want the bigger tank. A friend bought the 40 3 point tank with the 12 volt pump and is happy with it. I try to spray from 15 to 20 Gal. of spray to 1 acre and found that 3 to 4 MPH is where I need to run. The PTO cast pumps have to be cleaned after spraying as the chemicals tend to mess them up if they are left with spray in them.
Best of hunting and taking care of the future
Oldman570.