AF9035 DVB-T stick has no frontend

Software SW help
1 
[   92.671941] usb 2-1: dvb_usb_af9035: prechip_version=83 chip_version=02 chip_type=9135
[   92.672276] usb 2-1: dvb_usb_v2: found a 'ITE 9135(9005) Generic' in warm state
[   92.673344] usb 2-1: dvb_usb_af9035: [0] overriding tuner from 00 to 60
[   92.674505] usb 2-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[   92.674862] DVB: registering new adapter (ITE 9135(9005) Generic)
[   92.676521] af9033 9-0038: firmware version: LINK 3.40.1.0 - OFDM 3.40.1.0
[   92.676528] af9033 9-0038: Afatech AF9033 successfully attached
[   92.676543] usb 2-1: DVB: registering adapter 0 frontend 0 (Afatech AF9033 (DVB-T))...
[   92.677134] usbcore: registered new interface driver dvb_usb_af9035

After installing the driver and locating the correct firmware, the frontend0 isn’t created so no DVB software (e.g. MumuDVB)

root@turris:~# ls /dev/dvb/adapter0/
root@turris:~#
2

Looks to be a problem with the Turris kernel somehow - another AF9035 based stick (older, I think) also fails to load properly in exactly the same way