tanooki2017: Thank you very much for sharing your mod plan. Very interesting. I have no problem soldering, but I think I'll limit my mods to SainT's card and the LCD upgrade for the time being.
Are you planning on documenting your work on the Lynx once all the parts arrive? Something like pics, or maybe a YouTube video? Not trying to add to your workload, but if you manage to document it in any way and share the final result, I am sure it would be very well received. Heck, you could consider putting together a kit, perhaps.
In any case... thanks for all the info.