Yes, you can use your second kit to make the Fokker V.4 (not V.3) prototype. But please take into account the following differences:
- Lower and middle wings have the same wingspan
- VERY curved tailplane leading edge (more than in the F.I pre-production prototypes)
- Unbalanced ailerons and elevators
- No armament fitted
- Plain doped linen finish, with metal panels in freehand machine turned finish (Like the E-I, E.II, E.III...)
- Top wing Wingspan: 6.21m. (Dr.I: 6.725m.)
- Length: Same as the Dr.I, 5.75m.
- Height: 2.95m. (Dr.I: 2.725m.)
- 110hp LeRhone engine (almost identical to the Dr.I Oberursel Ur.II)
- No skids in lower wing
- Fokker factory pictures show it without markings, but later it was painted in a dark color (Non-streaked dark green, I assume) and cross painted in the (white) rudder. Not visible in the rest of the airframe.
I think that's all the info I have. Hope it helps...