Settling isn't an issue, its part of the design. Accomadating for settling is something that is explained in books/online and isn't anything difficult for a carpenter to grasp. Having the free time and having access/skill to use a chainsaw & axe are the biggest issues with log buildings. That and moving the dam things about
Sent from my XT1092 using Tapatalk
Yeah it's built into the design of a prefab. But you were talking about a DIY from just cut logs. Yeah most carpenters easily comprehend the settling from conventional timber building; but not on the scale that occurs with real log structures (from 8" to 14" of settling per story; more than enough to crush door frames and windows)