[VintageMA]

If you take a look at some of the heli forums you can find out a lot more information on the heading hold (or head locking gyros).

From tinkering with helis a bit, I am not sure I would use a heading hold gyro on a rc car as it does just what the name states it tries to hold the position in the direction you've pointed your heli when rotating.

Go with one recommended for something like the Blade CP or Blade CP Pro.

One thing to note though about most heading hold gyros is that they operate in both standard mode and heading hold mode. From the ones I played with the settings from 0% - 50% are standard operation mode. From 50% - 100% it is in heading hold mode. I guess that give you the best of both worlds for tinkering and trying out different settings.

They came out with a drift version of the mRS4 that had a gyro in it. From what I have read on a bunch of different forums most people have overall not cared for them in the long run. Using a gyro is not a substitute for knowing how to drive your vehicle properly and developing good skills that can transfer from model to model.