Great timing! Was up at my dads this morning, he is making a motogp style swingarm for my bro's race bike.
Here is the rear end of a standardf YZF750 swingarm cut out, you can see what it looks like on the inside, the adjusters are just bolts through a taped hole.

This is what it is going in!

Hand formed outer plate for the chain side of the new arm. The sniney tube is the frame end spindle.