Around 10 years ago I purchased and installed an internal power supply for, what was at the time, my main ColecoVision.  This actually took quite a few iterations to figure out the mounting hardware, connections etc.  At that time I actually purchased two power supplies with the intention of documenting the mod so that others could see how I did it.  Well, it's only taken me 10 years to get around to installing the second power supply, this time into an F18A modded ColecoVision, which is my curr