Lowering early type Cerebra seats -experience somewhere?

[black_350i]

There seems to be no way to adjust the early type of seats correctly for me.
I can either go for laid back/reclined, but not reach the wheel anymore, or bend continuously and still bump my head.
I would love removable cushions as there are in the later Tuscan style seats. Has anybody tried to modify the earlier seats accordingly?
It must be cheaper than an Orthopaedist?

Cheers
Henning