It ran fine for over 24 hours with the new settings, I'll try to take them out one by one and see if things change.

For the fun of it, I've installed X Windows and Bitcoin QT on the Edison and gave it a try (side by side with a web browser and a terminal) and you can see the result below:



So we basically have Bitcoin QT (a full visual Bitcoin node, with full verification!!) running on something the size of a postage stamp.