I’m using a 3D Printer printed frame that can hold slides and film. I can unscrew the film holder which then gives room for framed slides. I mounted the holder to a wooden bank that perfectly fits above the light source. Illumination comes from a Kaiser slimlite plano dedicated to photography. The slimlite can be powered via USB but has also a build in powerpack.
My camera is above at a repro stand with a Tamron 90mm macro lens. I also have extension tubes that I can use. Attached to the camera I use a CamRanger to control the camera from my mac.
Cheers
Joerg