< So for example with your last image, if your source orientation is positioned with its z axis like this (z in red here):
This is my result of manually use the Function Orient! If you see on the image the little lift corner you will see the default orientation ;)


The line/line is perfect for one position on the curve !
(little trick) just take the first point on middle on the baseline objet, the second anywhere to the end line base object, and you will have easily the postion on the curve with a perpandicular helpers line ;)

And then call the normal orient for slide the object on the curve! Bingo!

But, now , i have learning by heart the tripod position for arrive on a curve // on the ground for win a using step function! :)

So now I am a little more strong for make video about the subject!
Thx for the help and sorry for my unprecise first image!

Just a question : does the last tripod of function "orient" position is memorised when you closed Moi?