SummaryI have edited the other one, was with a m3 screw and i didn't liked the design!Print SettingsPrinter Brand: RepRapPrinter: Hephestos Rafts: NoSupports: NoResolution: 0.2Infill: 20%Post-PrintingWhat you needM3 - nut M3-soket allen -- http://www.ebay.com/itm/100pcs-Black-Allen-Head-Socket-Hex-Set-Grub-Screw-Cup-Point-Assortment-Kit-Steel-/281788279915?var=&hash=item419be3ec6b:m:mCf-u5Xu_nb0HRfNtQrmI2AHow I Designed ThisI have edited with blenderNothing special, see the blend file to find out more.