Had a go at this today as
@kitkat suggested, and found the gaiter is screwed on from below.
So don’t try to push it down from above.
The manual is misleading about this, as I’ve found about a few things while I’ve been fiddling around.
eg: the start button is installed from above the panel and not fixed below like suggested in the manual. Mine appears to have been bodged at build with a broken clip to make it fit.
And it’s not really worth taking off the gaiter to get that ‘open’ look. There’s a lot of plastic fixings and other gubbins that would be visible.