I borrowed my m-i-l's sewing machine, a Brother of some kind. It has a rather large foot, and only one. It also only has one needle, I'd prefer a finer needle. From the 14 stitching patterns, number 11 is the "all the way to the left", but on that setting it does not let you choose the spacing. You can only select spacing with the needle in the mid position. So a crap machine so far.
Second annoying thing, the foot pedal, they were economising on the cable so it barely just reaches the floor. To make matters worse, it is very hard to go slowly and carefully, there should be a "low gear" setting so that even if you overpress the pedal it still would go slow. But it has none of this. It was a challenge trying to press the pedal just enough to get it to move without going at 100 mph.
I managed to stitch one of my pads, a brand new one with 7mm sides, and the thread was right at the edge. I would have prefered the thread to be further inwards but it is impossible due to the size of the foot.
Now that I know what I want, I need a sewing machine with a thinner foot, thinner needle, and the ability to move its needle all the way to the left, as much as possible. And with a "very slow" pedal setting. Actually I need a machine with a good selection of ZIPPER FOOT !