Glass clip for Wanhao i3 heated bed

Retaining clip to hold glass added to the bed of Wanhao i3 otherwise known as a Prusa i3. Printable without support and retained by M3.5 10mm nut and bolt. Glass 2mm from old picture frame cut to size. Take care with placement at front left of bed as this can cause problems if to close to corner. Added new longer clips for 3mm Toughened glass from Amazon after cracking 2mm http://www.amazon.co.uk/gp/product/B00QM4LUN4?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00. One Clip per side holds w