There is a small note on the packaging, but nowhere in the product description --> "NOTE: With the Old Style Case (TC1 / TC44 / TC914) a plaster frame screw must be loosened after installing the adapter (4TSA). and tightened.)" Now find adapters; Our lamps were most likely installed by the original homeowners in 1991. UPDATE: After installing with the adapter ring, the trim did not fit as neatly YET, leaving a large gap between the trim and the ceiling .The installation was done by a state…