Recirculation filter for 3d printer enclosure

Looking for an air filter solution in my printer enclosure I found the one from FlyByTom and the remix from bblank01.
I made changes in the design so I could mount it vertically at the back of my enclosure, and I added a 125mm flexible hose and connector to create a recirculation filter system. This for two reasons, to keep the warmth inside and to keep dust from my workshop outside the enclosure.
Important to realise is I changed the design to fit the 9mm thick back wall of my printer enclosure.
I added the STEP files so you can change the ‘HEPA_mount_1’ and ‘Inlet_Hose_Connector’ to make it fit your enclosure.

Changes:
I changed the parts so the whole thing is assembled with 4x 100mm long m3 threads.
I added a hose connector for a flexible 125mm PVC hose.
I changed the Carbon Chamber grill so the pellets are on both sides enclosed by a grill with 3mm holes.
I added an air inlet. With the possibility to add a piece of an extractor hood filter to diffuse the air flow. My expe