Anycubic i3 mega V6 E3D Airduct

it needs to be fitted on and leveled to the bed. i leveled the bed first then put it on as high as it will go before lowering to the bed to fit it.(it can get stuck if you lower the carriage onto it) then i used 1.75 filament to space between. on the back mounts one side mounts from the front and the other in the back to give room for the hotend fan. i left space the mounting brackets to give play for fitting. i dont screw everything in flush, there should be spaces my carriage is not parallel