Hot swapping of batteries - anyone have done that?

[kalbien]

Hi there

I've been racing with my brushless truggy for some time 6 - 8 mins qualifieres 6 - 10 min mains.
I had a chance to race with nitros in 20minutes main. It was completely different racing experience. In 6 minutes there is one mistake or hit from other racer and there is not chance how to catch up. 20minutes were absolutely perfect.
I had to change batteries and it took about 40seconds (take of body, swap battery, put it back) ever since I've been thinkink all over again about some hotswapping device to be able to swap battery really fast, probably together with Mike's tray.

I am walking around, observing that system that holds ski boot on ski, or that system that keeps biker shoes on bike pedals... so far I could find anything that could be
a, light enough
b, strong enough
c, very easy to fast swap it...

anybody got any ideas or maybe even experience with system like that?