I may have mentioned this before, but it took years for It's Not Up To Us to reach me. Had the record forever, but preferred his playing on other dates, notably with Sunny Murray, Bill Dixon, Burton Greene, et al.. But at this point I think it's a gem.
The unissued material is enticing. The Palms are also excellent... supposedly a session with Eddy Louiss was recorded for Gilson's label but remains unreleased. There's also that bevy of unreleased Dogtown dates that Lancaster reported to Mike Hames for the latter's discography book. Now there's a rare volume...