What you mean by special tuner?yes Dreambox 800+ with spezial Tuner.
and what have this todo with autoroll ?The best is to flash openPLI or openATV and enable the ECM in stream option.
If you want to use the VTI image, you need to adjust the "ECM fix delay" setting to a value that works for you.
It works perfectly for me on a VU+ Duo2.
any Enigma2 receiver (which is fast enough) with oscam-emu
Vu+ Duo2 (I own it), for other receivers read this thread: http://www.sat-universe.com/showthread.php?t=285415
However, you need to bring your own keys when using Enigma2/oscam-emu (see pvu key forum here).
Which receivers??Is this receiver available within europe?
Yes you can Buy Europe dreamboxthe mentioned Dreambox+