for all people who are interested in a rack enclosure system, I have had a sample produced
Furthermore, a board can also additional be installed on the left side (e.g. for redundancy). Then there is a front panel with openings on the left and right side.
All combinations are therefore possible
1x BPI-R3 or
1x BPI-R4 or
2x BPI-R3 or
2x BPI-R4 or
1x BPI-R3 & 1x BPI-R4
I love that! I was looking for such a case multiple times.
I'll need one for BPI-R4 in half a year (after setting up new network). I hope you can get me one! 
let's stay in touch, I don't think that should be a problem.
This is a good alternative to the APU boards from pcengines,
as these are no longer manufactured
In a few days I will receive the next delivery of 10 prototypes. Let's get in touch then
I wonder if we can reverse the R4's board and use the metal case as heatsink, then we can make it fanless?
Yes, that is also an option. But then you have a large gap between the board and the metal case, if you want to use the onboard power connection. The use of an additional aluminum block with thermal pads, to close the gap, would then be optimal.
Wonder if it is worth exposing a serial console port (micro USB or Cisco RJ45 style?)
I deliberately refrained from routing the serial connection to the outside. This makes it more difficult for a unauthorized access (without authentication) from outside.
If you wish, you can contact the following directly https://x.com/WwingC/status/1840212113928925232
or
haileychen@banana-pi.com
sales@banana-pi.com
for all interested from europe,
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