Wouter - sorry for not replying (thought I did).? At the moment the club does not plan to set up a DecoderPro programming station - not enough bench space for a permanent monitor/mouse/kybd.
The good news is that I got the LocoShield configuration working (with a Pi 4).? I got tripped up for a while because the LocoLinx sketch for the Uno had TX set for Pin 6 and the LocoShield uses Pin 7.? As a result I could monitor LocoNet OK but couldn't get a soft throttle to work.? I was typing up a message to post here for some help and decided to look at the sketch again when that detail caught my eye.