BACK to tools ,I was at the junk yard a long time ago and found a couple boxes of 1 1/4 pound round weights (30of them) . Since then the local steel company that supplys the steel for my custom houses has scrap cut off pieces of 1/2 inch thick x 2 inches wide x 3 inches long that they give me when i stop by them. You could find any steel company and buy some at scrap price . I use these weights all the time for holding sheeting down while it drys or i can stand them on end to hold things at 90 degrees . The last block is out of very hard wood with tight grain i got from a cabinet shop as old samples. I drilled the correct size holes so i can put different size bullet conectors and solder them with out burning your fingers off or having to hold them some how. You can drill 3 or 4 holes in the shape of deans conectors also. I clamp it in a small heavy vice and put it on my work bench when soldering. joe