Restoring a Classic with retrobrite, logic and analog board recap, custom air intake and discreet MacSD upgrade.
The face and cover of the Classic were brightened with 40V peroxide solution and sunlight.
A custom, 3D-printed air box mounts a larger Noctua Redux 80mm fan. Fan RPM is reduced by a string of four 1N4007 diodes.
For easy SD card access without removing the Mac's cover, a slot extender is mounted to the analog board, near the picture controls. The first step is cutting an H pattern in the sheet metal with a rotary tool.
I bent the tabs inward and soldered the SD card extender to them. The switch above the card slot is mounted through an existing hole. It connects to the "BL" jumper on the MacSD. In order to update firmware, the switch is held while powering on the Mac. Below the card slot is an RGB LED, also passed through an existing hole, which indicates SCSI activity on green, errors on red and fragmentation on blue.
Kapton tape keeps the SD extension cable in place.
A new slot is cut into the case for card access.
The cover hides any visible evidence of modification.
I have uploaded some Macintosh ephemera for your pleasure: photos of the box, and some disks, of the Apple-branded 3.5" floppies I purchased during my first semester in college, fall of 1984. The Macintosh had been released earlier in the year and were already present in good quantity in the computer lab, the university being a member of the Apple University Consortium and thus could purchase them at a hefty discount. These are, of course, 400k floppies, and much time was spent playing "the floppy game" - swapping floppies and and out of the drive, endlessly it seemed. I was very glad when the Fat Mac (Mac 512k), and the 800k drive, arrived...
You might be able to faintly see that I wrote the version of the Finder on the label of the Strategic Conquest diskette - the system software changed every few months so I had to keep up with what I had. We could check out the software, both released and beta versions from Apple and other shops, from the lab - and we copied it as best we could.