hi John,
I developed the films.

So:
I shootes many subjects: but preferably architecturals and people in
the streest with slow speeds on my Tessar Rolleis.
5 120 rolls developed with microphen stock 8' @20?C are ok.
Full speed and more are gained. Some intentionally underexposed of -1
shoots are prefectly printable with only a slightly more contrast.
Generally rolls developed in Microphen soup are slightly more
contrast than ID-11 but excellent as new.
I think that it will be easy to print but I've to down the contrasts
in my condenser head.
I don't like so much tmax but this OLD rolls are excellent.
Tesar did the same very good job i suppose.

then:
5 120 rolls developed with id-11 diluted 1:1 @ 20?C, 10' 30"
wow!
I shooted some portraits. With my Planar Rollei.
wow.
Full greys tonal scale, mild contrasts, fine grain, slighlty more
acutance than usual. But this kind of negative is the best ot print
and work with it, because I suppose it's a good starting point -
Optimum density, no fog, no problems.
My condenser head will have an easy easy subject to shoot.

I should buy again more old dated (2001) tmax on my ebay pusher...

I will report my experience based on your suggestions.

Thanks!
Stefano