I should have checked when I still had a pack of 206 needles here but I've modified the shanks of needles to get them to fit machines. For some reason, the DBx1 needles I have are all way too fat to seat in the German machines - even the ones I purposely ordered for it - so out came my trusty dremel. How much longer os a 15x1 than the 206? If it's not got a weird scarf too, perhaps the shank can be shortened a little?