Mamiya Sekor M42 to M43 adapter issue/question

After googling a bit bought a M42 to M43 adapter for my Mamiya Sekor 55m f1.8. Everything fitted well, but the problem is i cannot rotate the aperture ring.

what i can do now to make the lens fully useful. do i need any other type of adapter with it? because looks like the aperture ring and the adapter has zero gap which i believe not letting the ring to rotate.

thanks in advance.

 

Subscribe to see EXIF info for this image (if available)

this is the adapter i bought. it feels like if could create a gap between the lens and adapter that would work. Definitely the adapter and the lens are too tight for the aperture ring to rotate.
is there any other brand/type adapter i can buy?

Edit : i'm going to try to make the pin shorter to flush with the aperture ring.

thanks