Finally, the SunRing Shadow Casters are being upgraded! The new ones are made from 1/4" thick stainless steel. I designed them in Adobe Illustrator, exported their definition as .dxf files and had them laser cut by SendCutSend.com. I will be installing the Winter Solstice Circular Shadow Casters in the coming days and calibrating them for alignment. Due to their precise nature, calibration should be much easier!