1. Print with supports, or clean with knife after, to preserve the retention flap for the sleeve 2. apply mold release. I used clear matte acrylic spray, which worked great. 2 thin coats as per manufacturer's instruction. 3. Apply properly mixed silicone to male mold half, ensuring to force the silicone into the thin crevices and evenly coat the surface of the part features. repeat for female mold half, and leave excess in the bottom. Avoid bubbles in all steps, or degass mechanically. 4. slowly push the mold halves together, allowing excess to purge out of the overflow channels. Ensure mold halve mating keys are fully seated before clamping mold together firmly, for duration of cure. 5. Upon complete cure, slowly remove the mold halves and separate sleeve from male mold half. 6. Trim flashing from sleeve, and carefully clear nozzle orifice with a sharp knife