Re my question

[oldwoodworker]

Thanks Geoffrey . It is a difficult one . it has 6 meters of piping that is why it has been so difficult to . A friend comes in every week to see how I am getting on . He said I don't think there is anybody in the world mad enough to attempt building it . I will try & figure a way forward .
Thanks Peter .

[Jonathan]

My CNC router easily has enough Z-travel to cut a mould that 'deep', however it would still have to be split into 4 parts since the machine isn't wide enough. That shouldn't be too big a problem though as they could be simply glued together.

The difficult bit here is probably fabricating a drawing of the part. Have you got any drawings which could be transferred into a CAD program to make a 3D model?