Magura Laurin- Making a air sprung fork mork progresive?

Sodajim
Sodajim Posts: 29
edited September 2009 in MTB workshop & tech
I have been told you can make most overly linear air springs on supension forks more progresive in action by adding a small amount of oil to the air chamber (reducing its volume).
I read the correct amount an a 2007 130mm Magura Laurin is 23ml?

Has anyone tried this out and what were the results??
Also is it simply a case of letting all the air out of the chamber, removing the top cap and pouring the oil in??

Any advice appreciated as always

Cheers
Jim