User blog comment:SamwiseFilmore/Kvoth Reborn!/@comment-26119768-20151130232724/@comment-25612015-20151201061257

For "plans" you could use a Schematica of the previous build or of some (rough) design made in creative.

About the peaks loaded without mountains, each world has a different seed and may get mountains or not at a place according to it. If I reload part of the map (which I can of course), I will surely get the same result. My advice is to use the 1:1 map to find a place suitable for your build, that's what reconnaissance satellite are good for :-)