Handibot-Laser-Ring This is a laser ring for the Handibot You can 3D print out, or mill out of wood this ring to attach to your Handibot to create a laser crosshair. The lasers I used are these ones from eBay: http://www.ebay.com/itm/1x-650nm-5mW-Red-Line-Laser-Module-3V-DC-/261448567330?pt=LH_DefaultDomain_0&hash=item3cdf8c8a22 PLA on a Makerbot works great, or 1/2" HDPE or plywood.