Garry, sorry for the delay in getting back to you. Traxxion confirm the following,
Both forks have rebound and compression damping.
Both forks have preload adjustment externally.
Rebound is adjusted externally on the right fork, at the cap.
Compression is adjusted externally on the left fork, at the cap.
I asked if the filing was as per the photo on the CBR800 site photo but he forgot to answer that question but I am sure you are correct.
The more I read the reports from users who have installed the AK-20's the more convinced they have a great product. Everyone lives them. Suspension is subjective and change itself can be a bit misleading. However so many report tangible results, tyre wear patterns returning to how they should wear, no longer squating on accelaration, no longer diving too much on braking. Increased confidance on bike performance for every single rider who runs the. For some who are racing, quicker lap times and some of those ... new personal bests for lap times. Thats impressive.
Now I really wish I had the cash to try a set because I for one would love to give these a go.