So while the dev build seems to have fixed the issue with the mk II cargobay and bicoupler not voxelizing properly, a new issue seems to have popped up. When attaching identical fuel tanks to each other, the cross section graph is no longer smooth as in previous versions, it flucuates around the attachment points. I made some images clarifying the issue: [spoiler=] FAR 15.2, everything looks normal: Same craft, dev build: Note how not only the cross section curve has changed, the wave drag area is also significantly different. The problem isn't restriced to mk2 parts either, its happening on all tanks I've tested: [spoiler=] Mk3, dev build: Adding wings also seems to do something strange, the entire shape of the graph is affected by them: [spoiler=] Images were taken on a clean install of ksp 1.0.2 with no mods other than FAR, MM and MFI using FAR 15.2 and the latest dev build (commit 8ba2f4f in the git repo). Reproduction steps are fairly straightforward: just slap a few fuel tanks together and enable the cross-section curve. EDIT: Log file can be found here: http://pastebin.com/2GmmcZGv