This simple clip design should print well even on poorly calibrated machines. I've added a "tooth" to the clip to concentrate the pinching force and improve it's ability to grip. The default settings are perfect for a MakerGear platform with heated build plate and a sheet of picture frame glass.Set the jaw_spacing and jaw_depth parameters. I used a jaw_thickness of 5 and it works great on the default settings. Use the tooth_height parameter to set how snug the clip should be. If the clip too lose or tight, you can warm it with a heat gun and give it a little bend.