@virusno1
i was pretty sure that it was not possible to downgrade without shsh blog!!! but i found a link!! so you can try that on you own risk!!! http://www.limera1n.cc/2011/08/downgrade-435-to-433-without-shsh-blobs.html

the link gives info on downgrading without shsh blobs...and plz if are successful!! save ur shsh!! :p