Silicone fluid is not only of the best - a lot of old-type rubber seal and so does NOT work together with silicone and the silicone eats the rubber. I would check my master/slave pistons-rubbersealings (Tom!).. And wouldn't be too sure that it really works.. Maybe your a little "heavier" pedal is due to more "resistance" in the pistons both master/slave due to silicone/rubber-mix.

In the clucth-system it has absolutely no meaning using silicone-based fluid - the fluid is in no (?) way exposed to high temp.s! (I guess not even in a typical morning-traffic into N.Y city.. :-) )

-and silicone fluid is also mostly too avoid water-bindings in the normal brake-fluid..-which again has to do with heating when braking and rusting the brakecylinders from inside - the clucth-system is all aluminium..

"Over-doing" is not always a benefit..

Use regular brake-fluid! -is my opinion.. :-)

Hope my english come out understandable and that Tom doesn't feel stepped on..

/Soren