Thanks for the tips guys. Somehow, I managed to use Sketchup for years without using Glue to Faces.
And sincerely, I donĀ“t know what I am doing wrong. I create the component as "glue to" set the axis I think correctly, and yet and copying and pasting, the component doest glue to the face.
**Anyway, I solved my problem for now with a plugin... Chris Fulmers "Components Onto Faces".
The plugin has placed one copy of the component at each of the glass pane faces (the glass panes are not groups nor components, so I can select all faces at the same time) all in the same height and perpendicular to the face.
So I just deleted the components that werent needed (left the ones at approximate correct distance to left and right borders of the panels) and selected them all and corrected their height.**
I had checked Chris Fulmer plugin before (I already had it) when thinking on how to solve my problem, but I had not thought about this solution.
Btw, I am not the architect, I am just doing the 3D. I told the architect that having each glass panel customized would be a pain in the ass, but he wanted that way because apparently the client wanted that way (client probably has not seen the cost yet), so I am not in a position to enforce logic in this case.
I think it will look better in the 3D but in the end (after trying to minimize costs) they will change to flat panels and maybe a few ones curved for smaller curves.
Thanks.