The fix is to select the top curve, "Show Points", select the pair of points in the center, and delete.

Now the point structure of both curves is similar.

Ed Ferguson

Hi DigiD, it's because although there is the same number of segments in the top and bottom profiles, the segmentation is arranged differently.

For example this line on top is broken up into 2 segments, while the piece on the bottom that should match it is only one single segment:



So with the segment structure arranged differently like this, when the Moi Loft commands connects up each segment in the top curve to each segment in the bottom curve you'll get a mismatched result.

To fix it you could either control the Loft by lofting in more granular pieces like between each sharp corner separately rather than just one single loft between complex curves, or tune up the segmentation so there is a one to one matchup between the top curve segmentation and bottom curve segmentation.

If you do it with several lofts, then you would select the surfaces and use Edit > Join to glue them together and use Construct > Planar to cap off the planar top and bottom.

- Michael

Thank you both

Both methods fixed it , Eds in one step more or less. Michael's method required cleaning up 4 lines .
I guess the bottom line ;) is use clean matching full lines when lofting