This design allows you to easily replace your filament by manually removing the extruder fan.
The extruder fan sits on on sliding slot, and to remove it you just need to pull it up.
I have add a Z-Probe ring if you have a sensor..
This is a remix from petiz ( https://www.thingiverse.com/thing:2822215 )
What you need to know:
print the design
remove the heatsink and fan cover
use the same two 50mm screws to put the mount in place
add the Z-Probe
simply slide the fan in!
Feel free for comments and photo if you make it