would flashing a RUU re-write the factory recovery?
http://xdaforums.com/showthread.php?t=2267378
I saw there are some RUUs around, could not download any to the moment thou....
http://a2phone.ir/index.php?file=%2FHTC+Flash+Files
Yes, an RUU flashes stock recovery. I don't see M8S on that list though, and have no idea if one is available.