Just had a little play with SPPB4 and it really looks promissing
I did find a little problem editing button groups though.
Made a 1 min. video which you can see here:
https://www.dropbox.com/s/wyji35p2b2a4469/SPPB4-issue.mp4?dl=0
You don't need to repsond to this.
Have a nice day :)
