Coupler for Separett Villa compost toilet (3" pipe)

Coupler piece to join 3" vent pipe for Separett Villa compost toilets. Fits snugly to stock 16" vent pipe section. Looser fit on 3" PVC pipe but can either shim with tape or adjust model by scaling

I split the model in half and printed it as two pieces (split STL included) so I didnt have to use supports

Modeled in OnShape https://cad.onshape.com/documents/47617d22140f2db86f3adeea/w/2989318e029faa96a1611a53/e/d25e7b8bedc54ae3337e57a4?renderMode=0&uiState=667f9a90593c757dd18f53e7