Unwraping a curved object (how I do)

[micheus]

Before and after smooth once:


Here a example how I released the stretched faces and make it part of the other islands I create for the rest of the mesh:


For the rest of the mesh - as it's possible to observe in the image in the first post - I selected segments to minimize the curvature to be unwrapped. When I invoked the UV map [LMB] for these segments I did new cuts again minimizing the curved areas and then used Projection Normal to unwrap the mesh:

Each island was arranged to be closed to each other and the gaps were minimized by moving surrounding vertices and after the Stitch be applied I used Tighten to redistribute the vertex weight in the glued area.