I was considering buying an RB912 along with the R11e radio card. This optimum configuration would require four antennas, but the only case I see on RouterBoard.com that fits this model with the daughterboard is the CA411-711 and it only has three (3) holes for antennas.
How is everyone else doing this kind of setup where you would like to have four (4) “rubber-duck” antennas attached to a single enclosure?
Once I get my M3D Printer in December, I can easily make my own enclosures! LOL
Buy a basebox2/5 with an extra mini-pci-express card and pigtails.
This way you have 4 or 5 antenna holes (RP-SMA).
That works! Nice recommendation, thanks!
It’s a bit large for indoor use, and having to use the PoE pigtail will be unsightly, but I think it’s workable.
Maybe in the future Mikrotik can offer the CA411-711 with an extra hole & grommet for that 4th antenna? 
You need indoor box?
See http://www.i4wifi.eu/out/pictures/z2/4016-ca_912_1_z2.jpg
http://www.i4wifi.eu/MikroTik-other-1/Indoor-Case-for-RB912.html
Awesome, that’s perfect!!
Oh.. I Like that one! 
Unfortenately the delivery cost is very high.
