X10 feels different with xbrace on?

[Timee80]

Ive just done the stick pack mod on my x10 and fitted the xbrace and x11 steering arms at the same time. Since ive done this the pred feels much stiffer at the front and is giving me less steering. Ive been told the xbrace alters the way the shocks act in some way, allowing you to run thinner oil. Is this true and what weight oil should i try. Im running the standard x10 shocks with rebound valve in(i like the feel with it in) but dont know what weight oil i was using to start with (havent had it long)
Any ideas guys?