motorizing a grainmill help

Toast

my Grainmaker 99 will arrive before too long and I want to figure out the motor thing pretty quickly.  I want to be able to adjust the speed.  Is that even possible?  I would like to grind flour slowly, but want the ability to speed up when I grind grain for animal feed.  Country Living sells a nice motor that I believe would work fine on a grainmaker, but it limits me to 60 rpm.  would a motor speed controller of some sort on a stronger motor do the job? thanks

 

 

the 60 rpm limit on the Country Living limits damage to the machine.

Toast

Speed up the milling by loosening the plates for a coarser grind.

Ok I see. The slow speed is not just to keep the flour cool, it's to keep the burrs cool. Thank You. Won't be speeding anything up. 

Today I ordered grainmakers diy motorization kit. It will make hooking it up to a common 1725 rpm motor a breeze