I've always loved the driptip that came with my Stingray X (RIP, less than a week old, TSA killed it when they rooted through my bag and dropped it. Skipped 4 threads on the lock ring). I've rebuilt it here with some improvements and wider funneling (seen in the cut away). Double O-Ring (Standard size?).
It's simple but very comfortable and nice. I recommend printing with a thick wall and heavy infill, or use Proto-Pasta Stainless Steel for authentic results.