Prusa i3 cordobesa Filament cooling

I have a remix of the prusa i3 steel called prusa i3 cordobesa. The X carriage on this printer is a metal one, SUPER rigid (And that is super cool) but unfortunately without any filament cooling options. So I designed this clamp holded filament cooling duct that works actually pretty nice. The fan I'm using for this is a 40mm one extracted from and old broken 1u server so the pressure is actually quite high, in fact I use it normally at 40/50%, and never went higher than 70%. On the other hand i