Singer start fm1306 has its common problem that is when you are sewing any thick fabric string bunches up.
It does not have that capacity of sewing thick jeans type of cloths.
You have to be very careful for resetting the thread, cause improper setting may cause for machanical problem.
Second one is that neddle is skipping stitches. And the reason is that the tention on thread is not proper by machine which results in skipping stitches and again if the top trade is not reaching the Bobbin, the thread will not lock properly.
Bobbin tention is not consistance.
And sometimes it makes annoying noises.
Yes it is working but have more problems. : (