And here's some more:
B-25/S-3 wingswap:
Su-25 intermeshing rotor attack chopper:
Airborne seaRAM:
Harrier Bomber:
Su-25 based attack jet (based on the obscure Avenger II from Macross) with a full carpet bombing load of SDBs. I wish they made a 2 seater su-25 in 1/144 or 1/72, I really want to build a bigger one of these:
Vigilante based interceptor:
VTOL F-18 attacker:
These two are prototypes of AEW aircraft with smaller wingspans to operate off small aircraft carriers.
Tandem wing:
Based on the Hs.125 AEW concept:
And this one was just for fun: