I took your advice and took pics of all the pipes and angles. Probably not quite as anal about it as you would've been - no tape measures!
Ha! As long as you can get your bearings from something else in the pic, you're golden. Just something to jog your memory about where everything is.
It would be nice if I could stand right in front of my panel, I have to admit. I have to lean over just a bit (so mine wouldn't pass code, I suppose). It's not like you're going to be cleaning that filter very often. Seems like a fair trade off to keep your other available real estate.
Not to belabor (well, ok, that's what I seem to do here at TFP!)... I can see you being able to get at the filter top OK-ish. How's the reach to the drain plug? I've only
seen mine done so far, but I'm pretty sure you have to be able to open that drain plug before you clean the filter. And from your pic's that looks to be on the back side of your filter. Can you get at that OK? Sometimes you have to get a wrench in there, too, to free it up.
I was in a discussion here a while back about modifying that drain with a valve that would make it significantly easier to deal with, and that's when you can actually get to them OK (they can be kind of a pain). If you can barely get to yours, or not at all, maybe that's something to explore, and/or ask the PB about. Not sure what Pentair would have to say about that, in terms of functionality or warranty, but maybe worth a a little thought before the PB disappears...
Here's the conversation, post #23:
Switch from DE to Cartridge ... talk me off ... or push me over the ledge - Page 2