I wouldn't worry about the extra little space. These guys only get 4-6 inches and they're like other angels I've seen that just swim in and out of the rock, rather than a tang that swims as fast as they can in a straight line.
They're also known to be VERY reef safe, which is not necessarily true of any of the dwarf angels.
Anyway, just an option you might not have explored before.
Wattabe (sp?) Angels are also supposed to fit into this category.
They're also known to be VERY reef safe, which is not necessarily true of any of the dwarf angels.
Anyway, just an option you might not have explored before.

Wattabe (sp?) Angels are also supposed to fit into this category.