Fair enough, these things need doing. Hope it all goes smoothly and you're back up sharpish - I've got a few posts I've been meaning to write up about some shots I took on the moor last week and I'd hate to lose the thread of it by waiting too long.
One thing I will say, Sunday nights can be a bit unpredictable for these jobs in my experience. How long are we looking at roughly? A couple of hours or potentially longer? Would be good to know so people don't sit there refreshing wondering if something's gone properly wrong. I remember a different forum I used to frequent had a maintenance window that turned into three days, absolute nightmare.
Anyway, hopefully it's a smooth one. Anyone else planning to use the downtime productively? I might finally sort through the backlog of photos on my hard drive, theres only about six months worth piled up on there.