DogHouseMom, thanks for the site. It told me what I thought I already knew...........use a less intensive stitched pattern when using 2 threads. Hadn't even thought about the patterns the re-step their stitches as that would either hide one thread altogether or possibly make a mess of it.
As to those of you that have responed, I'm using a quilting machine with robotics so I can adjust the number of stitches per inch as well as slow it down. And yes, the Innova quilt machine is considered a heavy duty machine in its own right.
I also plan to make a practice run as I did the last time to be sure I have everything correct. Thanksfully I have lots of fabric to play with and only need 4 chair seats but I also plan to make valances later with probably embroidery instead.
Thanks for all your input.