>
>~2seconds the rocket goes up... thousands of feet at around 60g (~580m/s/s!)

I would be very cautious around the crystal, and battery connections.
In hobby rocketry(HPR) we've had a number of failures that look to me like
the crystal either stopping, or ?? due to the acceleration.  We get into
that sort of region on the high end.
Resonators don't seem to fail that way, and of course there's always
internal R/C oscillators.


Battery holders using springs are problematic, because the springs can
compress and break the contact.  The first order solution is to put the
springs on the nose end, then you discover that the deceleration forces can
be quite appreciable when you hit burnout as well.

Sitting across the acceleration axis is probably best, if you have the room.
Welded tabs and soldered wires is the best alternative, I think.

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