I need to put a 2m/70cm antenna on the wife's car. It needs to be short and I already have an NMO mount. I'm looking a the Comet SBB-2NMO but it get's rather poor reviews. The SBB-1NMO is flexible. I don't know if that's a good idea or not. I want it to stay vertical at interstate speeds. The Diamond NR72BNMO is really short and get's good reviews. Does anyone have any experience with this antenna? The MFJ 1402 seems like it would work and it's cheap but it's an MFJ after all. I've heard good things about the Austin 500c but it's more expensive than any of these other antennas. Any experience with these or similar models? I'm all ears.