Start with a very delicous looking Leitz Summicron R 90mm. Serial no. 3031333 indicates this lens was manufactured in 1980.
Assemble all the tools and ingredients. Dandelion AF confirm chip, Leica R to Nikon F adapter, film caps to act as holders, screwdrivers, painbrush for the glue.
Fitting the AF confirm chip to the adapter was easier than I thought, although I did make the mistake of buying a glue that needed 10-12 hours to dry. Luckily I had other glue in my toolbox.
All it took to remove the Leica R mounting was removing the 6 screws.
The ball bearing is for the aperture ring which had to be carefully handled and stored away while the mount was being changed.
Marking the "cam" before removing it, so that they can be reinstalled later if needed.
The lens with the converted mount and the AF confirm chip.
Voila, a 20-minute job and I have this wonderful lens mounted on my Nikon D7000 with focus confirmation and metering all working.
Leica items are just so beautiful to look at.