Even the Voron 2.4 have some air leak from the Z gear motor assemble so you can't seal the door completely.
Monitor your temperature printing.
I have only had the Snapmaker J1 for a week and this is my first modification to help printing ABS.
I'm really impressed with the J1. Those of us working on tool changer have a lot to learn from the J1.
I have also developed a tool changer for Voron 2.4 see my git or YT if you are interested.
https://github.com/alfskaar/Hydra
https://www.youtube.com/@HDZ4260
The author marked this model as their own original creation.