Marc,
I don't know which Roden Albatros version you have but thought I would Post a list of changes I have made to the OAW version:
1. The Rudder is oversized. I used a WNW DV rudder and drawings to reduce the size and refine the shape.
2. The wing Radiator is oversized. I used a WNW DV radiator as a direct replacement ( required sanding off the kit radiator)
3. The radiator piping was the same as supplied for the centrally mounted Early DIII. I used one of the spare WNW pipes for the rear one and added a curved piece to the Roden part for the other.
Other Mods: ( Personal Choices)
4. I added some Valve springs using wound wire
5. I added Plug wires from sprue although they really can't be seen.
6. The kit interior represents a DI/ DII. I made a couple of small changes to better represent a DIII ( Mostly to the Stick and Rudder Controls )
7. Kurt Wusthoff's DIII showed a lot of stressed skin (Ply) so I used a Dremel and files on the fuselage. I kept it subtle and it doesn't really show in My Photos
8. I used rib tape decals from a WNW Fokker DVII to simulate the tapes.
One More Photo:

RAGIII