Experimenting with 3D printing to make a carb. rubber adapter for 2005 CR250 VF3 reed valve. It is angled slightly downward but is tough to see in the photos. The material is a bit on the brittle side but seems to be impervious to intended race fuel. It is a urethane acetate material. There is a better materiel available that has similar properties and is less brittle but I don’t have access to that at this time. Hopefully, thickness of adapter will overcome any potential damaging stresses and vibration. Time will tell. Fun-Fun!