I drilled and inserted a small magnet into the helicopter to attach them to some flight stand pegs - to which I had also added a magnet. The individual pegs are around 10mm and can be easily added to vary the height as required. They are the type used in Wings of Glory - i bought a bag of 100 from e-bay.
I have done two lots of basing with multiple and individual stands
I completed enough Infantry for a motor rifle unit - with infantry, heavy weapons, ATGW etc.
Both lots were by Heroics and Ros - I need to do another lot of infantry some time i think.