I've been working on a 5126 Portable, and I've cleaned and recapped the board, replaced the battery with a battery eliminator, connected a blue scsi, and recapped the backlight board (screen backlight is working).
It boots the macpak boot.vhd just fine, and I swapped it to use system 6.0.8, and a lot of stuff works, but a lot doesn't.
I'm not that good of a classic mac guy, and now I'm just seeking some software to double check the ram (4mb total).
The ram is seen by finder.
I found a copy of Snopper 2.0 that worked under 7.5.5 to test the ram.