These are 20mm longer massage nodes than the original for those with larger craniums. Scaling proportionally in the scaler didn't seem like it was going to work, so I eyeballed some new ones in Fusion360 to make sure they still fit in the original holes.
They're also scaled 99% of the original so the width is 1.98mm for a smoother fit than I was getting on my A1.
Image shows original length on the right (approx 130mm) and longer version on the left (approx 150mm)