the 9p group reflects "dry printing" or ink errors
using the deegam HB4 CD as reference, I group the phosphors by type ... LR, L, R, LCR or no phosphor ...
for each value study. a failure of HB4 focus, is that many plate errors are overlooked. to describe these on an album page or worksheet - stampCat V9 reports allow easy reports to be generated.
for years, much of my collection lay on the shelf - as I awaited a comprehensive specialised album, in pdf format. douglas myall attests no one can ever complete a machin collection - scarcity and price points.
however, we can enjoy our new finds on a custom generated worksheet, instantly.