What's your favorite thing to stick into a "sipping" pipeline so you know it will always consume at least one record and not worry about looping? I have a nagging feeling I'm overlooking something obvious that's cheaper and safer than using VAR and trusting I know an unused name:
'callpipe *: | var gskjunk |' etc. CHOP|TAKE|HOLE seems like the "right" way but complicates the topology: 'callpipe (end /) *: | skip: chop not 00-ff |' etc. , '/ skip: | take 1 | hole' ¬R