I have considered it before, but I think that 12V PC fans are relatively large, so when the fan rotates, it may get tangled with the coaxial line of the antenna;
However, there should be a demand to make the case larger so that the fan will not interfere with the coaxial line. I will see if I can change one of the two fan connectors.
For me, it looks like Banana Pi is widening the range of router PCBs 
:
I.
Have you ever considered (in some way) decoupling router board development and CPU performance?
For example, by using something like a CM5 board?
II.
Orange Pi awakened my attention by using a replaceable eMMC:
Has this your attention too? 
III.
2x M.2 M-key for NVMe SSDs 
3x M.2 B-key for 5G Modules 
IV.
Introducing the USB-C debug port increased usability!
In the past years, we often had people who encountered problems with the use of DIP switches in general. I didn’t want to question the use of NAND and eMMC.
But I was thinking about how we can make this more usable:
I’m not sure that a layman in their first days would be interested in boot topics so much! They are glad that the system works! Maybe there will be people who never overcome this hurdle?
I’m not really sure how we can solve this without impeding advanced users. But solving the DIP switch topic will cause less frustrated people.
Because some people use these routers as their daily drivers. And changing the boot configuration mistakenly (by mechanical action) could cause time-consuming debugging. And this is not good on a day when you really have something else to do and need internet access.
so, the case will not compatible with BE19?
