PLA dual head printing..Fan?

Quick question before I install this thing…

I have had basically zero luck with ABS and HIPS…always cracking, always de-laminating, weak prints.

But after I printed and installed a fan duct mod PLA works perfectly!

There seems to be no fan mount for the dual head for PLA. Is it needed?

The idea is the print with PLA and maybe hips as a support if it can behave itself.

Any help is welcome!

Maybe the experimental Dually Cooly Icefish:


Thanks, that might work!

Reading further is there any issue with printing PLA and HIPS together since they are such different temps?