I wanted to use a Bambu lab X1 hotend with my Anycubic vyper printer. So I designed a adapter to directly mount onto the original toolhead.
Printed fine without support. Make the top side(where the PTFE-tube adapter gets screwed in) touch the buildplate.
The PTFE-tube adapter can be taken from your original hotend. you also need two heat-inserts M3 and screws with nuts to attach the hotend.