Once, I routinely used a Nikon PS-4 Slide Copy Attachment and a 55mm f/3.5 macro lens reverse mounted on Nikon PB-4 bellows to copy slides. To make negatives for black & white printing, I used Kodak High Contrast Copy film (ISO 8).

However, I stopped using this setup when I bought a flatbed scanner that allowed me to batch-scan up to 24 slides (mounted or unmounted). Today, I only use the PS-4 set-up when I need to make slide-to-slide copies.