State of the project:
Real Life is backing off a bit, so I'm getting a chance to evaluate ideas and get things in line to actually bring this to a close.
Previously I was working with a Q605 board that I was going to hide under a cut down and thoroughly re-jiggered Classic II board for ports in an unmodified rear case. Trash80toHP_Mini was going to make the stealth ports board for me, and pop in a KVM switch so I could use the cool little monitor with any computer, not just the 605 lobo.
All in all, lots of fun ideas, but too complex. All those parts, and a donor Performa 460 case, will make a very nice LC475/33. No real loss at all.
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Currently I've decided to go simpler on the internal electronics, by going with an LC575's lobo and ribbon-connectors, and slightly more complex on the body-work by either modifying the stock Classic II's rear panel to account for the new port positions on the 575 board, or with a Color Classic Mystic-style rear door from the shaved down 575's. Either way there's lots of opportunity for me to mess that up badly. Luckily I happen to have a spare Classic bucket for back up.
Getting video out of the ribbon-loom will be my next challenge. I'm hoping that, since the Analog Board connections were unmodified whenever people shoehorned 5/6x00 boards into Color Classics, the AB schematics and diagrams for Takky hacks will be helpful here. I need to decide if I'm going to cut off the edge connector, take those signals out to a regular Mac 15-pin connector, then use an adapter to get it to the monitor's VGA connector, or if I should go the elegant route and make a little board that slides into the edge connector, does the conversion, and just sends the signals straight to the monitor's AB connector. We'll see how much spare volume I have to play with inside the case. Elegant will take more effort but way less room.
The 575 ribbon loom also has an extra SCSI ribbon/edge-connector for the CD-ROM drive in the 5xx machines. I think I'll just hack it off. I'm also strongly considering putting a regular 50-pin connector (and 4-pin molex plug) on the end of the SCSI cable I'm keeping instead of the edge connector for the slide in HDD/sled system in the 5xx series. I really wish I still had a stock CC ribbon-connector set up. Anybody do a Takky hack and have an old CC-loom in a drawer somewhere?
I still want to mirror the sunburst of holes on the CCII's left side onto its right and have stereo.
I'm still planning to use the LC power supply, since I'm not adding any new power-thirsty devices to the system. It should run the lobo, floppy, and HDD in this just like it did in the LC. I need to do some simple wiring to supply power to the monitor and LC power supply from the case's power socket and switch (I'm going to unsolder everything else from the analog board and just use it as a place to mount the LC PS and monitor AB).
I'm going to print the rear case sticker, and front Quadra Classic sticker. I need to go to Kinkos and see what my options are for this.
The body work on the front is mostly done. I still have some sanding to do, but the pout looks good, and the paint color looks close. I might mess with the paint formula a bit. If I wind up doing major body work on the back, that'll need finishing too.
TL;DR - Still working on this. Send me a Color Classic ribbon/connector-loom if you have one.