after using GF, should the awaiting calibrating function arise, it will not complete, even after half an hour or more. have to exit or refresh the page which eliminates all current settings/uploads. not a big issue for new projects, but additional artwork engraving for the original piece is lost.
and the camera is not sufficiently accurate to line up new art with the old, already engraved. the only procedure found to align properly is to make all artwork 12x20 area, making the drawing software do all the placements (save as separate pieces of art since the browser based software crap will not always separate the pieces - important when using different engrave/score/cut settings). laborious.
both the extended/permanent wait for calibration and alignment are both annoying as hell.