construction back curve

[samurai76]

hi to everyone, I'm trying to make the 3d in inventor of a armchair but I had great difficulty creating the curved shaped backrest. what you see in the attached image I built it by extruding in height the basic profile and cutting first from the side and then from the back with two shaped sketches. but the result is a little imprecise and little controllable.
do you have any alternative suggestions on the workflow to use to achieve the same result?
as I cone almost to the first weapons maybe there are tools or procedures that I do not know.. .
Thank you in advance.
samuele

 

[+forte]

use freeform tools

 

[samurai76]

thanks +forte, I have no experience of this solution and from the videos that I have consulted seem to me tools "poco technicians". ..however I do some evidence.
I thought of a 3d surface solution for the upper profile that goes to "cut" extrusion. I have to practice. . .
Thanks again
samuele