Valve Stem Seal Puller

Made this to pull the valve stem seals on my Subaru EJ25D (Phase 1 EJ25), which are 13mm OD x 9mm H, bet it will work for a lot of others. To use just push the main part down over the seal, and it will snap on, push the locking collar down to lock it on, then wiggle and pull a bit. My first print survived pulling 8 seals with no trouble at all. Would be good to mod this with a slightly longer and larger handle.