I need to replace a transformer for a 12V halogen downlight. The construction of the roof makes this impossible from above the ceiling space so I'm faced with withdrawing the fitting from below, in the assumption that I can draw the transformer through the hole and replace it.
My fear is that I won't be able to get the fitting out without irreversible damage to the Gib. Has anybody met fittings like the ones in the photos, and is there a procedure/trick for releasing the spring-loaded wings?





