Hi, We're still working on our extended elevation, and have been having problems getting the centreline to work with extend configuration commands. We have found a number of occasions where an "extend reverse stationname" command reverses one leg at that point but doesn't apply to any folloeing legs. e.g. in a passage going 5 -> 6 -> 7 -> 8 -> 9 -> 10 extend reverse 7 gives: 5 -> 6 -> <- 7 8 -> 9 -> 10 when I would expect: 5 -> 6 -> <- 7 10 <- 9 <- 8 We've ended up having to add explicit extend right configuration for station 7, then station 8 and station 9 etc. We've tried to pare down our survey to one example of this in the attached file (julagua-elev_testcase.th) There are also several other examples where this occurs commented out. Any chance of fixing this? Cheers, John & Hilary