Dual HEPA filter with stock Bambu Lab filters

I have designed this exhaust filter that can be used with two original Bambu Lab filters, as the printer's original system does not have sufficient airflow and seems inefficient when printing ABS.

ATTENTION, THE FILTER MEASUREMENTS HAVE NO CLEARANCE TO ENSURE THAT GASES DO NOT ESCAPE THE FILTER, SO THERE MAY BE SOME RESISTANCE WHEN INSERTING THE FILTER, THE TOLERANCES OF MY PRINTER DID NOT CAUSE ME ANY PROBLEM WHEN INSTALLING THE FILTERS, BUT IF YOU HAVE PROBLEMS, PLEASE PRINT THE VERSION WITH MORE CLEARANCE.

To ensure maximum airflow, it is necessary to remove the filter from its original position and replace the cover with this modification:

https://makerworld.com/es/models/795850-p1s-hollowed-out-activated-carbon-chamber-cover#profileId-734970

I clarify that this modification of the original filter cover does not belong to me but it is very useful to complement my mod. 

You will need 2 BT3-8 screws to secure the filter to the rear panel.