Spur gear adapter

Sorry but this didn't turn out to be the easy ready made spur adapter I was thinking it was going to be. I was able to make it work but one of the toughest things was after I drilled it out for the 6mm out drive the recess for the O-ring was too small. With a lathe this may be an easy fix, maybe.... I used a drill to spin it and a dremel to make the recess bigger. also the screws holes to mount this adapter on the diff need to be about .5-.75mm further out. There was some other work I had to do to this thing to get it to work too. All in all, it's not an easy deal.