Thank you Mike,
I supposed already that my version is an individual construction although it looks very professional. As it is quite deep and long (covering almost the whole length of the bilge) I guess I would never be able to remove it if I have to work under the engine.
Second point is I cannot see where the deepest point of the bilge really is and I would like to place the hose of the bilge pump exactly there. At the moment it is led down quite close to the fly wheel on port side. I think it should be more sternwards and a smaller aluminium tray like yours would be more useful.
So maybe a photo of your solution could be helpful (wallenstein-at-itme.de).
Gerold