Hm, I was thinking I’d need to get that end cap off at some point, so I guess that might be a destructive process.
You might’ve noticed this thread I posted, where I note the trickiest aspect of disassembly will be removing the apparently pressed on impeller…
The least bad idea I had to do it was to remove the motor’s end cap, support the back of that plastic shroud as well as possible, and push the impeller/rotor assembly down until the back of the impeller bears down on the front of the shroud (both of them nice and flat with a decent amount of area), and just have a go at punching the spindle out of the impeller.
Levering it off from behind (a <2mm gap) seems like a terrible idea, and I can’t imagine any others short of fiddly mucking around with heat and cold, which also doesn’t seem too smart given the shroud is plastic…