Had far more success tonight, this post (with video!) was particularly invaluable for anyone else sucking at pressure scales:-
I’m on the bumpy side of the paper here but it didn’t seem to put me off as much this time. The photo/lighting was slightly kinder to me this time too, this is more accurate in contrast.
I got into a real flow doing these, making incremental adjustments with whatever I wasn’t happy with on the previous scale and mostly improving down the board, the one I was most pleased with is marked with the arrow near the end.
My main observation now is that I need to band my lighter value section together more so there are no individual strokes visible.