Grady McKinley,
Susan is giving you good advise, also many the of replacement light covers for these
KW transformers were just a might taller than the originals, Susans fix still applies.
I found this out because long ago I lost the red one and the new cover was slightly higher than the original. I took a dremel tool and skimmed the bottom of the cover,
if you do this make sure you account for the threads.
PCRR/Dave