Some people made their own controller or bought a cheaper basic option.

I was looking at over £5k for the opplliger box that I wanted which would have been better ratios but that would still need a new clutch and probably prop shafts and the hydraulic clutch.

The killer would be the fabrication if you couldn't cut the tunnel and weld in the new bits and would you want to cut up a cossie shell now they are going up and you would need the carpets re trimmed.

I am sending my car off to a trimmer for bespoke carpets.