2wd or 4wd with same buggy???

[audgen]

I posted this over on rctech but I thought you guys might have a little more interest, at least I hope.

So, how cool would it be to have a buggy that could be converted from 2wd to 4wd in just a few minutes? The greatest R/C invention since oil-filled shocks, or ball difs?

I'm sure I'm not the first person to have the idea but has anyone ever tried it?

Thanks, Tracy