I NEEEEEEEDDDDDD ONE OF THEM!!!!!!!
Do you mean you need a U.W.M.W.D? It is really complicated. NOT! All it is, is an old 10" Chop saw (or table saw) blade attached to a weed eater. The hard part is the nut to hold it on the with. You can take the nut out of the regular head that holds the nylon string. The hole on the blade is a little bigger then the shaft, so you have to be careful to get it centered before tightening. The best thing is that if you are using a carbide tooth blade, you don't have to worry about hitting the dirt and rocks, it will stay sharp for a really long time. In fact, an old dull blade is better then a new blade because a new blade will dig in too fast. The blade in the video was so dull that it would smoke when trying to cut a 2X4 on my chop saw. The blade is heavy and it does take it while to gain speed but it has a lot of inertia once it get going and will power through just about anything.