I recently acquired a Singer 138G101 - I think it's the same as the 138W101. I can't seem to find much information about it online, so I'm guessing the G means it was made in Germany. Needle feed, twin post bed machine.
We've given it a good clean and a service, and it works like a charm. However, I recently found another machine with a rather cool needle holder, so you can use it as a twin needle with knock out function: https://www.tysew.co.uk/industrial-sewing-machines/twin-needle/singer-138w101-twin-needle-needle-feed-post-bed-industrial
So I went on a hunt. I found the needle holder. It's arrived today. However.... it is quite a lot longer than the original. The thread fits, but obviously the needle bar is now too long. Does anyone know how I would go about installing this. It's 20mm longer than the original. Could I rise the needle bar that much or would I need to install a shorter needle bar? If so does anyone know the part number?
Thank you