This is a large variation form my two previous models, but one I personally needed. Its a very simple case meant to easily hold 16 sharpie pens. the fit on the lid is a bit friction-y but comes off without needing to hold the base. I fit on all of the pens is good, able to remove and place pens without any force, except for one of the center slots. I think that particular slot is a bit tighter due to my printer instead of the model because all of the slot are the same size. If anyone does print this model I would love to see a picture of it posted to "Makes" picture area. Also, Thangs won't generate a preview of the model, so I have included pictures of the model in my CAD.