CR-10A Fan Duct for Volcano Heat Block

I desired to print large stuff fast but I had an abismal time changing my nozzle to 0.8mm and getting good prints out of it.
So I turned to a volcano heater block. The block added a bit to the Z so a new fan duct was in order.
I used DrMahLinh's design as a template to position the holes and went from there.

Note: It says CR-10A as it seems there are two versions of the printer: the older one with the silver fan cover (A) and the newer one without (B).