Today my DC-DC Step Down Buck Converter 1.5V 3V 5V 9V 12V and Adjustable at 3 amps Modules came in.
I am now powering my ramps with a 20amp 24volt power supply.

I removed D1 replacing it with the output of the buck converter I soldered the diode anode side to IN (24vdc) and soldered the diode cathode side to VO leaving the GND terminal to be soldered to the Ramps ground Power Connector.
I did not install a DC-DC Step Down Buck Converter Module set to 5volts to replace the AMS1117-5.0 at this time
This was on my agenda so I could use the full graphics controller that draws to much current from AMS1117-5.0.

Will do this after the Full graphics controller arrives.