Dear electronic gurus, (2 part question) I want to check that: If i got a 12V motor (such as http://scientificsonline.com/product.asp_Q_pn_E_3041860" [Broken]) would i be able to adjust its RPM if i got a: 12V dimmer switch box (http://cgi.ebay.co.uk/LED-Lighting-...6:2|39:6|72:1683|240:1318|301:1|293:1|294:25") and a 12V battery pack and some circuit wires What am i missing from this list, in order to get a functioning motor where i can adjust its RPM? Secondly, what would i need if i wanted to make the motor spin the other way? Is there a special dimmer switch that exist that would let me do this? (I was told that its a matter of inverting the current?) I am aware that i could cross the wires on the motor, the other way - but i was hoping for an easy, less fiddly way of doing it) Thank you!