Adrian - some extension of dev time with the FB Cooltone definitely seems to help, that is, at the same dev dilution. I certainly haven't tried anything like premature "snatch" dev with this paper yet. But for a good DMax, more prints seem to need around 3 min rather than 2, which is
typical for most analogous papers. I have always varied paper dev times and temp depending on exact circumstances, but in this case it does
generally seem to need a bit longer.