Something that might be worth suggesting to the maintainer.  I know he's
linked some work with Mike Scarpitti (oddly enough, given the overall
opinion of his work here), concerning densitometry tested zone
contractions and expansion of, IIRC, some Agfa films.  Other that that,
unless a time matches a film or developer manufacturer's figures,
there's just no telling where it came from.

Even with my times, the ones for HC-110 (other than the monobath, which
is pretty much self-regulating) are probably significantly shorter than
you'd use for the same contrast -- most likely because, lacking extra
hands and a proper darkroom timer, I have to start my time after filling
and capping the tank, and I don't compensate by pouring out early
(though this should add only a minute or so, at most, while some of my
times differ by a factor of two).  OTOH, I've also seen enough contrast
variation with the same time, and an agitation difference from fifteen
seconds once a minute, to ten seconds every three minutes, to account
for a 50% increase in time to restore the contrast with the lower
agitation; I may simply agitate more or more vigorously than others
(though I don't think I do -- once a minute, five inversions, sometimes
the same inversions less frequently when I'm after reduced contrast or
want to help the shadows a little by extending development and want to
keep the contrast in control).

In any case, if you get acceptable results by extrapolation, more power
to you.  Otherwise, if you're dissatisfied with published times, might I
suggest testing each new combination rather than relying on the times
other publish?  First, clip an exposed leader and put it in developer in
the light; time until it just starts to darken.  Multiply by (IIRC) 20
to get a starting time (you can verify the factor by comparing against a
combination for which you know a good time), then clip a few frames and
develop at that starting time to evaluate contrast, and adjust as
necessary with the second clip or remainder of the test roll (which
should be all the same subject and exposure, with normal contrast range
of five to seven stops, and metered with an incident reading or by Zone
metering).  Once the normal or "N" development is established, a
ring-around test will let you set your working EI -- and with two rolls
of film and, at most, four or five development cycles, you've
established your EI and normal development time starting from knowing
nothing about the combination.  You should be able to do the work in an
afternoon, if you have few interruptions.

Why do you occasionally use fake IDs, Greg?

It is,.....very long process times 18-19 minutes to achieve
a grey card value .75 sheet film,......if that. That is
if one is trying to get full emulsion speed.