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I think that should be fairly straightforward. For my SpeedMac board there was coprocessor socket. I installed a MC68882 and it worked fine, but not all software is compatible with the SANE “trap” that most SE accelerator’s control panels use to enable the 68882. Also, the MC68882 sold on...

I've scanned and uploaded the Mobius 030 Accelerator manual for Mac SE and Classic here and on Macintosh Garden https://macintoshgarden.org/apps/accelerator-card-drivers . Enjoy. The manual was from my original 1993 purchase for my SE. Sadly I no longer have that board, but the SE lives on...

A great write-up: See "Classic Mac web surfin’ with Web Rendering Proxy (WRP)"  https://metalbabble.wordpress.com/2020/03/31/classic-mac-web-surfin-with-web-rendering-proxy-wrp/

Technical correction " For the grayscale Duo 210 and 230 there are no electrolytic capacitors to replace in the display . . . "

Update:  For the grayscale Duo 210 and 230 there are no capacitors to replace in the display, so you only need to focus on capping the motherboard.   Other Duo models as show above will have capacitors to replace in the display. I'm attaching a photo of the Duo 230 Display Board and also the...

Update:  Refer to this post for Duo Display Recapping: 

Excellent @sutekh   Thanks for the excellent pics!  I stand corrected.  Inserting this phrase for search: "Duo display recapping"

Related Post to Duo Recapping - https://68kmla.org/forums/index.php?app=forums&module=forums&controller=topic&id=48570 Also - I verified my issue was due to electrolytic fluid from leaking motherboard capacitors migrating down the board to short out the battery connector.   While...

I'm not sure we have the same exact issue, but my Duo 230 recently developed a burning smell, which I narrowed down after disassembly to the area of the motherboard near the battery charging terminals.  In my case the Duo continues to work, but I don't want to use it.    In my case the NiMH...