First, I want to say thanks to everyone on this forum for the help over the past few months.  Based on some of your input, I purchased a Kubota 
L5030 HST, FEL, with an Unlimited Fabrication root grapple.   If you are near the Washington Metro Area, I can't recommend High View Sales in West Virginia enough.  They are the best.
My question is regarding rear weight to counter-balance the grapple and its' load.  I don't want to lug the bushhog around due to the length.  What are weight boxes and where do you find them?   The grapple has amazing strength, but with a load, the rearend becomes very light.  
TwinCreekAcres
Round Hill, Virginia