Art, That is excellent info! Thanks for the idea, time to start looking for some used metal ones.
Like Will, I have been using my 5' Rake, it probably weighs same as my blade, but the rake hangs much farther back. Over the weekend I added a 4 foot locust log to the rake, just for some extra weight.
Kwolfe has the right idea also, add weight to a heavy implement.
I have seen people add suit-case style tractor weights to implements, like hang them off of grader blades and such.
I am seriously considering welding some expanded metal onto the lower frame of my grader blade, and filling some cinder blocks with concrete, so they can be moved to various implements. I made one for my drag-behind spiker/aerator, bent a peice of rebar as a handle, adds some decent weight, in an easy to manage form.
But, I have an old beat up upright smoker, that is a cylinder about 20 inches tall and 16 inches round, I'm really contemplating filling it with concrete and any used metal I can throw into the mix....run a rod through it, so it can be fastened to the 3PH.
If you have a carry-all (rear forks) you can simply add weight to a small pallet.
Bricks, blocks, rocks, logs.
I am leary of water filled containers, unless they are 100% full.
When partially full, the water sloshes, front to back and side to side, that has always made me wonder. I think commercially designed water filled ballast boxes have separate compartments and/or baffles to keep the sloshing in check.