I remixed Heavyhold's design to work with 2.5" shop vacs and made the base (where it connects to the hose) a little stronger.
**Someone told me it wouldn't fit, but I told them to just shave the hole a little as they probably got a tiny elephant's foot at the base ... Sure enough, that fixed it.. If you want you can print it at 1 or 2 % larger, but I prefer a little tighter than looser and it will probably loosen with use.... If I get more feedback that it is too tight, I will make it a little looser.
MyShopVacNozzle.stl | 407.3KB |