Grappling Dummy's vs Throwing Dummy's
It is important to understand they are two different dummy's, with two very different designs. Grappling dummy's are lighter. This allows you to easily move them while on the ground. They have longer arms and legs, so you can easily practice locks on them. They also bend much easier. This allows you to put them in various positions and locks. They are not designed to stand-up to the beating that a throwing/takedown dummy is. I recommend design two for grappling dummy's.
Takedown/throwing dummy's are much heavier. This
allows them to more closely duplicate takedowns of a real person. They have
shorter arms and legs. This makes them more stronger and better able to stand
up to the beating of repeated takedowns. Some of them have the legs combined
into one. I wouldn't recommend this design, if you plan to practice lower
body takedowns. They don't bend nearly as easy. This Makes it easier for someone
to hold them up, for some takedown practice. It also is easier for them to
stay up, as the thrower holds them in preparation to a judo or upper body
type throw. For a throwing dummy, I would recommend design one, with some
additions. I would put in a heavy wire frame, of the heaviest wire I could
find. I would add weight, probably in the from of sand. The snow suit should
be the heaviest you can find. They hold up a lot better than I expected. I
would then use TONS of duct tape to cover the complete dummy. For duct tape
I recommend 3M Highland 6969 duct tape. It isn't cheap, but it is 10X better
than normal duct tape. A throwing dummy is better suited to ground striking.