"Leon suggests supplementing the 5V supply."

Yes he does and I agree with the idea but not some of the suggested 'fixes'.

I am working on a stand alone 5V PCB that would be used to run these displays only and would generate its own 5V supply so it wouldn't cause any strain on the existing (already stretched) power supply in the machine.

It seems there is enough interest so I will persue afull size digit version. I have to have 100pcs of PCBs made minimum order but realistically that is only 20 'sets' of displays..…..

I have been asked about other colours so maybe I could supply them with option to choose Orange, Green, Blue or White displays???