Ha ha ha ,, I just got back from my sewing machine fix, and came home with a dressmaker .... not quite as Hi tech as yours,, but Just sat here trieng to get figure this out , yes they stay left for straight stitch,, if you put on the quilting foot the needle lines up with the hole in the foot...
Aaaaaa the machine I have takes a shorter needle the the standard singer needles.. I always check the needle lenght in a new machine against a singer needle 100/18,, I put in a singer 100/18 it sewed good but I could hear that chunking sound. That needles tip was beat flat, I found one new short needle in teh goodie box whiched the original .. she works just like new,,, the needle package says made in holland ,,,40F1 - 14 ( 1775 ) just looking there a 1/16 " shorter, grind the top tip off a singer and that would be about right .
The needle and bobbin moves just like yours... no serial or model number just a metal tag at the up and down buttons saying nationally sold ,, made in japan
doing a google on this all I get is the euro pro dressmakers