Solid side panel 2U 3U 4U - KWS rack

Wanted to optimize my racks airflow for the KWS 10 inch rack I'm building. Couldn't find solid side panels, felt that the open air ones kind of defeated the purpose of putting fans on it. For a 12U rack 4 of these 3U panels will meet flush with the top on each side. The one you see with the opening for a fan is one I made to mount the board of a NUC7i5dnb(without a case) to the inside of the panel as dedicated opnsense machine. Not all nuc's have the same dimensions but if you'd like that model just let me know in the comments, it keeps it nice and out of the way and saves rack space. Update: I've added 2U and 4U panels now as well. In the 3mf file is all 3 sizes, just delete the ones you don't need. I also have side panels with mounting holes for the TP link Omada EAP 670 router/access point, 80MM fan + filter side panels, 7" touchscreen + Pi mount, and 4U blank panels for closing off the front/back.