Sounds like you have it covered with GRJ and the Diptrace forums. I didn't think of those forums? I had looked at those a while back, but as you say it was somewhat overwhelming. I haven't mastered the Diptrace libraries, more work needed there. I can change footprints, but have not tried making any. GRJ is the resident expert here on all that stuff, he's way ahead of me as he is on everything else too!
I did find the Arduino items I was thinking about but it was in EasyEDA, JLC's online design program. It might be easier to make one as GRJ says, rather than try to adapt the EasyEDA patterns. I had looked at EasyEDA some time ago, but Diptrace seemed easier and more intuitive to me. I need to start learning the Diptrace libraries too, just been busy with other projects lately and haven't really tried to do anything with it. It doesn't take much to overload my tired old brain these days.
Just a FYI, but one thing I have trouble with is allowing enough space between components on the PCBs. It all looks good in the design program and when the PCB arrives it's cramped in a couple of spots. Nothing has failed to fit so far, but I had to whittle a tad off of a couple screw terminals a time or two.
