RE: Boda antenna
I've used these antennas to lighten two different Optima 6 receivers and both work flawlessly. They have the Ultra Miniature Coaxial Plugs on both ends so you can simply (but carefully) unplug the stock BODA antenna and replace it with one of these. You basically cut one of the connectors off leaving something like a 6" antenna and then strip the outer sheath off about 1" of the tip. I can get you the exact measurements if you're interested. I replace the antenna and shrink-wrap the RX.
Digi-Key Part #: A36229-ND
[link]http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=a36229-nd&x=0&y=0[/link]
I've only used these on foamies and they've been rock solid to the distance I can see/fly a foamy. I wouldn't recommend this modification for a full-range application.