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hotcrystal0 wrote: October 6th, 2026, 6:40 pm However, adding B5e kills the replicator while preserving all the other mentioned patterns,

Thanks for the tip! I'll probably get to work looking for guns for the small spaceships.

I found this potentially interesting rule: B2e3ceia4zcer5ajq6cea7e8/S23-qr4ce5nyqj6c8

It has 2 small and common c/2o spaceships. (I call the smaller one the "inchworm" but have no name for the larger one):
x = 13, y = 2, rule = B2e3acei4cerz5ajq6ace7e8/S23-qr4ce5jnqy6c8
3o6b4o$obo6bo2bo!

There ...