OK, I've accepted the challenge. I'd intended to do it twice - once as a slower walkthrough with talking, then again to see just how fast I can do it really. But it started raining before I got to the second bit.
But the slower walkthrough with talking and camera fussing was 1:15 for off, 2:15 for on.
I said if I ignored the ramps and just drove over the deck (which I sometimes do) that I'd get to 1 minute and 2 minutes respectively. I did do the ramps both ways on this, and that was at least 15 seconds each way.....so although I didn't actually do the speed run, I reckon that this validates my numbers - without rushing I did it in the claimed times, if I exclude ramp time.
I also showed a bit of how I'm lining up the deck, and how I avoid having to get down on the ground or lift/horse the deck around at all.
It really isn't that hard to do this, but there is a little technique in it that I've learned over the couple of years I've owned the machine, so hopefully that is also useful for someone.
I do think the LX machines will be a bit different in the attach/detach, because they're floating decks rather than hanging from the machine. That may mean you don't need to set the deck height to zero to take it on and off easily.