Horsch 4ST ridging

[Trigger Happy]

We bought a Horsch 4ST in autumn as a second drill
The outside coulters seem to throw a fair bit of soil on to the previous bout causing uneven emergence. Drill speed is sensible and I think the wings are correctly set.
I found this disc set up on the internet and wondered if anyone is using it just on the outside two coulters? The kit's not cheap at £800 so I'd like to be sure before buying.

Many thanks

 

[PSQ]

Ours came with the outside discs, and there is no notable ridging.

We have had to replace the left hand disc though, as it had cracked around the dished area in the centre.

 

[Trigger Happy]

Thanks PSQ, that's helpful.
Horsch sure do know how to charge for parts, as far as I can see it is just a disc on an arm £400!

 

[gorgous]

My drill is the same as psq but discs ok so far.

 

[debe]

The rear covering harrows can be set too narrow, the side discs don't really do anything