Ok, thanks for answering my question so soon.
Great, with the procedure you explained to me, I have succeeded in doing what I needed.
But forgive my daring, I think it is a bit complicated and slow to do all these steps to change a stroke and modify it to adapt it to a drawing, it is not comfortable for illustrators.
Wouldn't it be more practical and intuitive if the modifications in the brushes panel were applied directly to the selected stroke?
There will surely be important technical issues that will justify this being so for the moment. But your tool has many very good things compared to the rest of the applications on the market and even so, I think it could improve small aspects to become the best of all by far.
It is my humble opinion and I apologize again for my daring. There is no doubt that you are a young company with a lot of talent and a lot of work ahead of you. And surely there are many people like me bothering all day with suggestions and requests.
Thanks and best regards.