J, thanks for the insights you could dig out of your mind about the Forty Reasons session, and sorry for answering just now...very busy with my job lately...
Yes, the improvised sessions contained in that album are something very noticeable, the way they sound, as short snapshots of instant compositions.
Actually I remember they influenced me a lot, and with the band I had at that times we enjoyed a lot doing that sort of stuff: meeting on Sunday morning, play some stuff until lunch time, go and have a nice Italian lunch + wine, get back to the instrument, choose a random ironic title, press rec on the multitrack, play as if we all knew what we were going to do...
We ended up with a lot of albums just for ourselves, with a lot of random situations!
Luckily, we also ended up with a composition of mine, a lot Wackerman-oriented, with this strange title Another Sunday