2. I thought smash only VSI will help all the static based instrument
such as ALT, ASI because the static system are all connected. Once
the air bleed through the VSI, it will propergate to the other
instruments through the static connection. I think I am right on
this.


Yes, you are right on this. If knowing altitude becomes critical and you don't
trust the "average" reading, then yes I would smash the VSI without
heasittaion. But if I believed I could trust the average reading, especially
if I had nearby altitudes clear, I'd leave it alone.

Jose

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