Hi Gunter, also if I understand the type of result you're looking for you probably don't want to use just one Flow here.

There's a lot of difference in width across what you want as your target and that's going to introduce a compression/squishing type effect for a full pattern type flow attempt.

Do you want these pieces to be warped to conform to the surface at all or do you want them to have no warping and just moved and rotated?

If you don't want warping you'd probably be better off using Transform > Orient to move and rotate individual pieces to align with the target surface normal.

If you want only slight warping to the local surface you could do a projective flow on each one individually after it has been positioned with Orient instead of trying to do a full pattern Flow at once.

The full pattern worked well in your previous case because you didn't have much variation in width in the target surface in that case.

- Michael