can be programmed to self-replicate in any number of ways, but it's so big that it's very hard to simulate it through a full cycle. By contrast, Pavel Grankovskiy's "DOGun SaGaQR"
OK, I didn't know if it was a "true" replicator (what even does "true" mean) so I excluded it. And, running a true replicator from other rule in 0E0P takes millenia, so that leaves DOGun SaGaQR (specifically the QR configuration). Sorry.
Actually more than one true replicator has been constructed. The 0E0P metacell
https://conwaylife.com/wiki/0E0P_metacell
can be programmed to self-replicate in any number of ways, but it's so big that it's very hard to simulate it through a full cycle. By contrast, Pavel Grankovskiy's "DOGun SaGaQR"
https://conwaylife.com/forums/viewtopic.php?&p=138191#p13819...
only has one pattern of replication, but it's much simpler than the 0E0P metacell and can easily be run through many cycles in Golly.