Single row of wave disc for an existing cultivator

My Hungarian customer asked me to design a line of wave discs onto his existing cultivator behind the rollers for the better crumbling and mixing of the topsoil.

The speciality of this job was to design a rough and strong frame structure that can be bolted on the present cultivator frame, so there was no cutting and welding allowed. My customer also required height adjustment regarding the rollers position depending on the weather and soil condition.

You can see the final design below