Firstly - Can anyone tell me how much does spring flipping, as per the tech wiki method, lower the rear end by?

Secondly - Any major problem just cutting the front spring to lower it by 50mm?
I've got a longer spare set from the 200B struts I fitted that I could try with.

The end result I'm after is the ute to be level, so the back will need to come down 70-75mm
If this is not enough i'll go with getting them reset somewhere in Melbourne

Cheers David