chimera+ fan adapter 30mm -> 40mm with part cooling 5015

I am designing a chimera+ mount for my creality cr-10. With this part you can replace the 30mm stock fan with a 40mm one. I will publish another design for a chimera+ mount.
I printed this thing with 20% infill and with support only touching buildplate. Printed out fine and works like a charm.

Furthermore I wanted to mount a part cooling fan from the front (in combination with my other designs the part cooling is done from the back and the front).
My attempt is to design a mount which does