Hi Peter, I wrote that post back in 2009, the original poster never came back and explained how the modification went.
I have learnt since then from greenskeepers, that it is not a good thing to modify a cylinder mower away from the original settings as it can upset the cut due to the tilt of the bottom blade (bedknife) which is the most important part in the cut.
The bedknife is the single most important factor in achieving a great quality of cut. The bedknife�s job is to position the grass before the reel blade cuts it. Depending on where the position is will depend on how clean and consistent your turfs 'after cut' appearance will look.