I think Sparky may have moved on, as these posts are more than two years old.Hi Sparky49,
Check this website https://challenge.toradex.com where you can find multiple projects based on Single Board Computers and System on Modules along with project details such as schematics, boot files and related files which are used to build.
Mine always seem to get shut down even though they are relevant to the OP.I think Sparky may have moved on, as these posts are more than two years old.