The Riser option is designed for those who do not need to regulate the air flow, but need good ventilation of the K2 PRO. For example, for those who print mainly PLA and PETG. I took it as a basis. https://www.printables.com/model/1432480-k2-pro-riser-with-slider-vents-parameter-files-in and he removed the latch, as the original part turned out to be too fragile and raised doubts about reliability.
Now the walls are solid. I've improved the ventilation. In addition, there is less noise due to the narrow slots. I didn't complicate the design with complicated locks and fixed it only with plastic ties.
This may not be the most aesthetically pleasing solution, but it's simple and reliable.

P.S. After many experiments with printing, I came to the conclusion that the temperature inside the camera is still high (it all depends on which room the printer is located in). And I made a Riser with which the cooling is better, please follow the link below: