Peacock

Can you try to install those two ipk and see if input2/3_choices now created?

Place them on /tmp and install them like that:
 

cd /tmp
opkg install *.ipk
reboot

Then after reboot provide the following command again.
 

grep -r "" /proc/stb/tsmux/

Worked like a charm here too. Finally!

Have 2x dual S2 tuners, tried everything: swapping cards, take one out, retried manual configuration endless times, etc.

AutoDiseqc just gave : Tunerstatus LOCKED and then a series of fails...

I'm just typing the stuff I tried and looked for on internet until I finally found this post... Maybe these breadcrumbs bring in more victims ;-)

Thanks for all the work!