Hi folks....
I spotted what I think is the fastest motorola CPU we can put in the 575 "Mystic' logic board after the 20Mhz crystal upgrade. I *think* this is the motorola CPU that has the FPU inside of it:
http://www.ebay.com/itm/201024477214?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
$45 and free shipping from China.
jack the new kid