Hi
I am still running my setup on the first post without any issue.
To send to rtk2go with this setup put CFG-PRT: USB out to RTCM3 only
You will not see the sats in u-center but that’s ok.
Another good thing is to set the UBX-CFG-TMODE3 : to fixed with the base coordinate.
I am still on fw 1.12.
There is maybe an issue with your RTK2Go inscription? I think there is something when subscribing about parsing? Not sure about this.
Edit: If you brick your SimpleRTK2B the solution is here: