Homebrew PCBs

> Which Minicraft thing do you mean?  The  	 	 	 	
> Proxxon 28510 Micromot Drill 50/E ?    It is a 40W machine.   I'd
> prefer the 100W IB/E (even pricier).   I don't understand why these
> tools come with six different sized collets.   I guess a collet is
> nothing like a drill chuck.  Maybe somebody can explain it to me.   I
> guess these rotary tools are all based on the same motor controller. 
>  They all say 5000 to 20000 rpm.   Maybe the same motor too.

Okay, I have cured my ignorance.   After looking at this website
http://www.efunda.com/processes/machining/mill_cutters.cfm   I now
know what a collet is.   After looking at this website, it dawned on
me that this machine can be used for milling as well as drilling.   

Alan