Bought it in 1999/2000 and directly sent the lower to Chief AJ's White Barn Workshop(*) and had them install their 1911 style slide release and hammer safety, and their custom 1911 grip panel inserts.
Yeah, the new 22/45's come with grip panels, but this was big time 10~12yrs ago.
The upper has a Millet no-snag front sight, Volquartsen trigger and Power Custom titanium firing pin and extractor.
(*) Chief AJ still has a website but there doesn't seam to be much about firearms. I don't know if they still do gunsmithing or if the workshop even still exists.