I've just posted a how-to on my new "journal" at the Model Railroad Hobbyist website:
https://forum.mrhmag.com/post/charleys-ho-1939-socal-journal-12472209?pid=1333686052
I had to cut away some of the weights to make space for the board but it all went together reasonably well. I wouldn't recommend this as a first project for a newby but if you have the skills it is possible to convert a DC-only loco with no extra space to make room for the electronics.
See a video of it in operation at: https://youtu.be/_IUN-pSsGSw
My next step will be to add couplers, details and a little weathering to fit my 1939 modeling year.
Awesome!
That is one of the complex installs we have seen. Very professional and nicely done.
Loved it. Thank you for sharing.