Thanks for all the very kind comments on the 720!
Sorry that the gyro did not work out for you Janis, but I did love the very wise qoute on 'mothers and daughters'
I have handled a lot of 720's in many variations from hand solderered initial prototypes on development boards, through to the current production version's and never had a single failure in or out of flight. To obtain the best possible performance, the 720 can be mounted in different ways and the rules are generally very simple.
1-Temp drift does not exist until you have heated the sensor enough to imprint a defined small square the exact size of the sensor on your finger (Yes it does hurt!).
2-If the gyro does not perform anything close to expected and suffers random motions in the hover at any TX gain; change the location as engine vibes are killing the sensors ability to sense motion correctly.
3-If the gyro drifts; then the mounting is too firm or a high rpm moving component is running out of true.
4-If the gyro gives a wiggle through 3-D manouvers; then the gyro is mounted too softly and is being shook by rotor head vibration.
The gyro is supplied with a soft mounting system to minimise the chances of vibration drift, but you can firm up the mounting as long as you see no vibration drift. As an example, my current OS 50 Hyper Powered Raptor runs a 720 with very firm 0.5 mm tape between the gyro and model with zero vibration drift. If I saw a hint of drift with 0.5mm tape, I would try 1 or 1.5 mm tape (up to the stock mounting system) until no hint of drift is evident.
Hope this helps...
RussD (CSM tech support)