I have finally succumbed and have bought a Roco Z21 DCC controller with wireless handset. I saw it on eBay at a price I should not have been contemplating but its siren called to me for a week and I succumbed. I have already programmed Die Keinnamebahn into the IPad app and copied it to my iPhone ready for its arrival. I blame a friend for involving me in programming his 00 layout on his Z21 system ...... I draws you into the dark side with its ease of programming and controlling a layout. What takes minutes on the Z21 took me hours to do on my Raspberry Pi/Sprog3 based system.
Have a happy 2022 folks
Ah yes, but I'm sure you enjoyed the challenge!