I wanted a replacement nozzle for my 40V Greenworks leaf blower. First print was a surprising success. I was guessing I'd need a least a couple of adjustments to my guess. I measured the opening on the original nozzle and eyeballed the angles and curvature. I added a couple small tabs to stabilize the print. I was concerned that the clip section would fall over during printing without them. I printed with black Elegoo Rapid PETG. It was a tight fit, but a couple taps and it clipped in place.  Enjoy