I wanted some heavier split shot type sinkers and never could find them but did find a mold http://www.do-itmolds.com/prodmolds.aspx?c=80. I got the 1/3 and 1/4 weight one. It works great however the slot it makes for the line is too big to crimp on small line. The company says the B-40 blade is the only one they make for the mold. I managed to make one slightly thinner but if I go as thin as needed I don't get a good mold. Any suggestions? While typing this it occurred to me that maybe lowering the temp on my pot may help. Whatcha think?