Like the design, BUT you cannot stick anything out further than the edge of the gap:
carriage gap_620x600.jpg


The arms come across the gap when you print at extremes.
Now they don't come across much, so you can put fairly low things there. But not the full fan shroud.
armscross_800x600.jpg


But with it being a 25mm fan you might get away with it.
If you make the hole cover plate 1mm thick It might fit.

Drop me the stl and I'll try it out :-)

Oh yeah, just measured fan - they sent me a 30mm after all. Despite that option being greyed out when I bought it, why I ticked 25mm in the first place.
Go figure. Wonder how big the 30mm fans are lol