After experimenting with several options, I have come up with a simple method to add an LCD display to the Sandwich.
I use an I2C buss LCD display. I need to add only two wires to the sandwich. I modify the code slightly and thus I get a frequency readout.
Attached is a standalone display attached to the sandwich. I added a 5 volt regulator to supply power to the display since it does not like the 8 volts where the sandwich is connected on the Radio board.
I also created a box using a choc perfboard with a Li-Ion battery pack to power the radio and the LCD display.
I have the code available on my website along with the dual band code. qrvtronics.com
I do not have a complete kit available for this, yet, but Adam is having built a couple of faceplates for the standard box. If there is sufficient demand, a kit or partial kit will be made available depending on demand.
I used Anderson Power Poles to allow recharge of the battery pack as well as access for external power.
Please comment on what you think.