This is going to be much more productive if you tell us what make,
model, type (mechanical? Electric? Pellet?) vario you're talking
about.
John Cochrane

Thanks JC appreciate you chiming in.

It is mechanical, has two ports on the back, one says static, other
capacity. Emblem on front has a A W written on it. I know it's more
complicated than just plugging in the static line and the capacity
line. Not wanting to use it as a simple vario. I like the netto
idea.