HollowMan

I'm not sure if this is the right place to ask but here goes. I have a buddy who has an Adler 10-7 and he was wondering if my Singer 29k51 bobbins were interchangeable. We measured them and they would not fit as they were too small. The million dollar question is will the larger SInger long arm bobbins fit his Adler 30-7? any info you can give will be much appreciated.