And for the traditionalist.......A 34" high hardwood tree stump works awesome for tuck shrinking, plannishing, shaping, sand bag stand,workbench, etc. If it worked good enough for Enzo Ferrari's boys, I think us mere mortals could adapt!
Hit up metalmeet.com to see all the great metalshaping tools you can make. You would really be impressed with Wray Schelin's video on the shrinking wheel. He shows how to remove dents with a "slapper" and a dolly. A slapper you could make in an hour or so. You need a section of a leaf spring, about 4" long and a piece of pipe for a handle, for one style, and then there is anoter style that you would need about 14" long. This style is like the Harbor Freight product, yet is heavier.
They are also selling a smaller version of that post dolly for about $15.00. Not a bad looking piece.
IMPORTANT: When metal shaping, the finish on your tools will impart that finish on the item you are shaping. Be sure to sand and polish the faces of your tools. It is time well spent to "tune" your hammers, and dollys, to eliminate any unwanted sharp edges. Especially on hammers. You will want to radius the edge quite a bit, so you don't get "smiles" in the metal from a bad hammer strike.
BTW- Instead of buying a mallet for $30+, Hit a garage sale and look for an old bat. Cut the handle off, and drill the main body. Insert the handle into the hole, round off the cut end, and you have a great hammer, with more weight for less effort, and it only will cost you a couple bucks and 1/2 hour. They work amazingly well, and my Fornier sits in the box.