As @birdman says; not a good idea to power off the box if it is active. When it's in deep standby it uses less than one watt and the countdown timer is running so it wakes at the relevant time. If you were just running recordings each day that alone would not have been good enough to refresh the EPG unless you have Freesat EPG enabled and you were on one of the major channels (BBC/ITV/C4) for long enough. CrossEPG tunes to the SKY EPG and downloads that, but you would have to have explicitly run that on a timer. Your plan to run ABM and CrossEPG on timers daily seems ok to me. I have my GB Quad set to boot from DS at 17:50 each day and have the built-in OpenTV EPG reader set to run at 17:55.