Butty Bits Bump steer bushes

[vinvan]

Hi, As any one used Butty Bits Bump Steer Bushes to flip the track rods over on a lowered bus, Questions: (1) how low does the bus need to be lowered before you have to fit them ? (2) what is the steering like after fitting ? (3) Is it worth fitting them ?
My bus is a RHD 69 only lowered a couple of inches

Any feedback would be appreciated

Thanks Vinvan