If you like ITCCK (and who doesn't) and the Posiedon record, and if you don't have the below - basically the out-takes from the aforementioned - then you definitely should have this. Japanese pressings are your friends.
McDonald and Giles
Hi KP,
afaik, Japanese pressings are from a copy of the mastertape.
I would recommend a UK Island ILPS 9126 pressing, either
on the pink Island "white i" label or on the pink rim label.
Both are from the same "mother".
Regards Toni