I really love the Opticooler on my Wanaho i3 v2.1 so I thought why can't I use it on my BX?
So I started to tinker with a remix and found the MAD system. Was a perfect match.
It's not really in the spirit of the MAD mod. I changed the base, to be able to use the Opticooler and I added a slot for an connector.
The OptiCooler source can be found here https://www.thingiverse.com/thing:2927210
Removable funnels,
if you don't need cooling just remove the funnels
If get a bad print the funnels will break off and you will not get a big bal of filament
Connector:
Add it so it's easier to change the fans if they break down.
Remove the first layer for the connector channel after print.
Edit:
2023-05-14: Added step files
The author remixed this model.