While not an exact answer to your question, I use the Tamiya gyro for the Tam Leo2.

The unit goes in the turret (same location as the gun barrel).

Servo with stick, gun stays, as the Tam T-06 detects pos stick or neg stick for elevation, not current position.

Not sure why you need two-axis gyro as vertical is the only detection needed (unless you plan on using IR tracking for turret rotation axis orienting).

Heli's need dual because of rolling, if a tank rolls you have bigger issues than orienting the gun!