I'm very new to 3D printing, and the Startt printer is my very first one. Ive had several successful prints, but certain files just won't print, or take forever before they do start printing. Ive had more complicated files start printing before relatively simple designs. Is there an average time to expect between hitting the print button and the machine getting to work? Or is it dependent on the file itself? Also what factors would cause a print to start quickly? And vice versa take a long time?