Hi folks, Stacho fixed these "when using Survex loop closure" bugs in yesterday's development release: https://github.com/therion/therion/issues/269 Therion miscalculates fixes in multiple centreline blocks when using Survex loop closure https://github.com/therion/therion/issues/270 Therion cannot have exactly 2 fixes for a station when using Survex loop closure And this Survex compatibility bug: https://github.com/therion/therion/issues/263 Scale value should default to 1 when omitted from "calibrate" commands I have checked and verified the fixes, and my surveys still look right. But could someone with a bigger dataset check that it didn't break anything else when using Survex loop closures. That particular fix looks like the kind that could create regressions. It only improved things for me though :) Yes, your cave entrance locations will change if you ever ran into #269 without realising - they are supposed to. And yes, you might find some parts of the cave change size if you ever hit the calibrate statement bug. Cheers, Tarquin