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However, if the usage changes the stream (such as by adding gaps) then the stream carries information, and there might be some benefit to using the stream early on and then crossing, rather than just having the usage (and gun) take place after the cross.
YES! That is why! I guess I just figured it ...

I did think about it, but still don't see how there's any difference between a glider stream with no gaps in it that has crossed another glider stream, and one that's made by a separate glider gun on the other side of the stream.
What I'm doing uses the streams earlier on, so I can't just start ...

Thanks so much! This really helps!
However, two streams of gliders with no gaps in either stream don't actually carry any information, so there's not much reason to cross them. You could just put p30 guns wherever you want the two streams to come out, or reflect one or both of them -- it's a lot ...

This is really helpful, but for what I'm doing, I can't have gaps. Is there a way to do this without gaps, or maybe fill them in? Or is it impossible?

Have you read the forum rules? First introduce yourself to the Game of Life and then ask questions.

This is the first example of a glider duplicator:
x = 332, y = 319, rule = B3/S23
2bo$obo$b2o5$9bo$10bo$8b3o6$17bo$15bobo$16b2o5$24bo$25bo$23b3o6$32bo$
30bobo$31b2o5$39bo$40bo$38b3o6$47bo$45bobo ...

Hello there! I was wondering if there were such a pattern, a still life maybe, that can split a line of gliders into two. While I'm at it I may as well ask, is there is any way to cross two lines of gliders? Thanks!