Quilting a curved chair

I’m really stuck for how to add quilting to a curved chair, I have managed to do a lot of this in the past using a diamond shape and soap skin & bub’ing. I have also managed to use extensions to add these onto curved surfaces when the curve is 2 dimensional (IE- the curve goes like a C chape) however I am currently trying to add a quilted texture to a curved chair which is a C shape as well as curved back (the back of the chair doesn’t go straight up, it has a rake) See some images for examples below.

I have built my chairs using the SubD extension which I have just found to be excellent, perhaps there is a way I can do that through this and QuadFace Tools?

Suggestions would be very welcome

Chair V2018.skp (6.8 MB)

Chair Attached if that helps

Update - This is my attempt at doing this on the model before SubD - two trials, both failed, I feel there must be a way to generate the diamonds on this when SubD is active somehow though?

You might want to check out this thread on the sketchUcation forum. Alvis is a master at furniture.
https://sketchucation.com/forums/viewtopic.php?f=81&t=57637

Took a quick look at your model. Several problems that jumped out. The model is not proper QuadFace quads and crease values are pretty inconsistent ? If I have the time might give your model some play.

Thanks for the link Tuna1957. That has some really useful information on there and I have just read through the lot of his answers to others’ questions. It looks as if he is doing very similar work to what I am too. I have managed thus far fairly well with other chairs and booths/sofas with the soap/skin tool but curving onto two planes like this chair is a challenge for me using the SubD program, I’m about to give this Artisan tool a go to see if that works better (It looks as if he is using that)

I have attached my updated model that has proper quads, hopefully this is better. Thank you!

Updated Chair.skp (634.1 KB)

Your welcome. I think Alvis started out with using Artisan but if you look at his more current posts I believe he has transitioned to using SubD also. Artisan came to market before SubD.
At lot of good information on SubD can be gathered from this thread also…
https://sketchucation.com/forums/viewtopic.php?f=397&t=63826

Ah yes you are right, here are some of his updated works
https://sketchucation.com/forums/viewtopic.php?p=668955&fbclid=IwAR2KjPSqvWEAI-9oEAh633Ia_dKv0JijJF3YEZLbJFsTBF7vZeFHi3bVGiE#p668174