On 6/27/07, David VanHorn wrote: > > What do you mean by 6 layers ? 3 or 6 stacked elements ? > > www.ferrotec.com see "three stage modules" Crystal clear. I've used this cascade combination and I can tell is difficult enough if you want -80C. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist