Flying bases
The bases are available from Forgeworld.
We, like many gamers, use these with small magnets; one glued to the plane, one to the top of the stand. This makes transportation much easier. We use small cylindrical magnets, available from Dom's Decals.
They work even better when used with Beagle Nuts!
Left: A base from Forgeworld, with attached magnet; a Beagle Nut; and a 1/300 scale RAF Phantom with attached magnet.