Three corrections:
First, not so much a correct, but a suggestion. Instead of saying that Green quit on 4/11, it might make more sense to say that Green announced that he would be leaving the band on 4/11. He wasn't exactly a former member of Fleetwood Mac the next day.
Second, Weston and Walker joined in Sept. 1972, and were in the band during the show you listed.
Third, the two Weston albums were recorded on the
Rolling Stones mobile studio at Benifolds.