I'm not sure if it's me or my parts. - Yankee Hill Machine Keymod Q.d. Sling Adapter Qd Swivel Not Included

Look at the pictures and the top pic shows the underside of this part. Notice there are tabs at each end of the part. I guess these go in the keymod hole /slot. When I installed it , the nose of my QD ring would interfere with the hand guard, the tab nearest the qd hole positioned the qd hole so that the qd ring nose would not enter the larger hole on the handguard. (I hope that makes sense) Soooo. I carefully ground the tab nearest the qd hole off. This allowed the qd nose to fit in the big end of the keymod slot and still let the attachment screw secure the mount to the hand guard. Glued it also. After several hundred rounds fired with a sling in use it is still secure.
I will be replacing this when I see something I like better.