Sorry i havn't been back to this, been mega busy the 4k isnt the only thing in this house that needs attention lol.
yesterday morning i sat watching my box in standby, at 6:02 am the front clock stopped ticking, this is exactly the time that epg_refresh is running, and that is what i thought was causing the crash, i have disabled epg_refresh to autorun and this morning my box didn't crash.
My epg refresh is usually set to poll from 5:55, it does a fake recording for 300 seconds on pvr_epg channel (cable) then tunes to BBC ONE N W (Terrestrial) for 300 seconds as a fake recording. My T2 tuner is a USB Sundtek, that could be the cause, i know there was a a new usb dvb driver released into the new vix and maybe that is the reason i am having this problem and didn't when running ATV which was probably pre-dvb usb driver.
At the mome i havn't got time to mess, i may flash back ATV and run software update and see if my config fails there as well.