(13 years ago) Interesting level!
Took me 5 tries.
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EDIT 2023, 15th Jan. - I still find it an interesting puzzle. I feel it's a shame, cause there are two solutions. Not sure, how it could be fixed, though (in order to force only one of those two). I am quite often not very good at fixing my own levels, either. :))
I can't believe it but I got it on 2nd try and that wasn't luck... Due to the configuration around the target, I thought that one method should be logic. I applied it and it worked. So proud... Now for me that wasn't really pipelining here since this logic approach solved it. I don't think it will work the same with other pipelining levels.
Insights