Summary Based on http://www.thingiverse.com/thing:1753983 which was nearly impossible to print, this version has Chamfers and thicker walls making it printable. Print flat long side down, Support suggested at the two end openings only. Print Settings Printer: QiDi Tech Rafts: Doesn't Matter Supports: Yes Resolution: .1 Infill: 20 Notes: I used minimal support at the two openings and it printed great.