On Sat, 24 Sep 2005, Byron A Jeff wrote: >> You can make a better mirror using >> the spun cast method or by using a dish as a former for a fiberglass or >> composite concrete copy. > > Cost? Complexity? Making a large fiberglass mirror (or antenna) is no harder than making a boat. In fact it is easier. Once you have the form (the satelitte dish) it's easy. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist