I just installed two TT3L10 DVB T2 internal plugin tuners (dual T2) to my Duo2. Fantastic result. So at the moment my Duo2 has 4xT2 internal plus 2x Sundtek T2 usb tuners.
Totally 6xT2 tuners. No problem with Hades 010. I hope you can have these tuners also in UK from your sponsor.