Hi. I've been looking at RPT projects like reprap and fab@home whose aim is to provide a low cost solution to rapid prototyping. I was wondering if anyone with RPT experience could tell me if those machines could be outfitted with a laser (like what you might find in your typical home/office laser printer) and use a stereolithography to perform the printing. I guess some things I want to find out are, like what wattage laser is needed to cure a vat of photopolymer to form a solid object. And is the cost reasonable to make a low cost 3d printer.