Hi Hadrian,
Way back in 2010
I added a thread and drawing of the dampers
https://www.a7a10.net/forum/index.php?topic=2895.msg19476#msg19476If you can access machining facilities its an easy job to make a set
At the time there was discussion on the length of the "rod" as the valve does not reach the oil with the factory
amount filled in
Recently Julian added the instructions from Eddy Dow,
Fitting the Dow complete kit involved fitting longer fork bushes, this shortens the overall fork length from standard
by 2 in.
No mention is made of fitting the dampers to standard forks
I added extra oil but reduced viscosity to 10weight when I fitted the dampers to my A10
experimenting until I was happy with the "bounce"
John