Personal Project: Subsonic Wind Tunnel Design

This is a personal project to design a fully functional subsonic tabletop wind tunnel so that I can visually verify some UAV designs that I'm planning to repurpose some old drone FPV hardware I've got sitting around. So far I've completed calculations for sizing the contraction section, test section, and diffuser for the flow speeds I'd like to sustain. Currently in the process of designing a centrfugal fan system to attach to the end of the diffuser and aerogrids before the contraction section for pressure equalization anf mitigation of turbulence.