Ball Mill - Used to grind stuff. This is the only way to make powerful BP like the pro's! Or can be used to grind stuff to a fine powder such as charcoal.
Scales - A must have, all pyrotechnic formula's are by weight (never volume)! To really be useful it should be atleast accurate to 2g preferably even more accurate.
Coffe Grinder - A useful device to grind things. Can powder charcoal and such. I use mine to make Al flitters from foil!
Rocket/Fountain Spindle - A much easier way of making rockets than drilling the hole. Plus it makes a superior product! I still havn't got some made or bought.... although I plan to soon!
Star Roller - A machine that makes stars. It can make stars much faster and easier than cutting or pumping them! Plus the stars become round like the professional ones rather than square like cut stars. While it's mainly for ease and cosmetic purpouses it also allows for color changing stars!