Hello, with my recent purchase GMF-1600 was a FSN OFA Attachment you can see here:

FSN OFA Professional Systemzubehör Oberfräsen | Bosch Professional



This is 70Eur attachment marketed as Professional.

The problem is with very bad tread quality used as "Professional" adjustment for position on a rail.

You can see the photos that show the quality of the thread:

Photo 1
Bosch FSN OFA attachment very bad quality-fsn-ofa-problem1-jpg

Photo 2
Bosch FSN OFA attachment very bad quality-fsn-ofa-problem2-jpg

Video see the wobble for yourself:


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