T.E. Probe Question

Hi All
My ship has a multi probe. When the ship is sitting on its tailwheel
the the probe is level with the ground. And the T.E. part of the probe
is straight up and down. When the ship is flying in a somewhat level
flight attitude the probe must be pointing down in respect to flight
attitude. And the T.E. part of the probe is even farther back, not
prependicualar to flight. Will this lead to airspeed and variometer
reading errors? Or just airspeed errors? Or just variometer erors? I
assume static is static and don't matter which plane the prob is in.
But we all know how to spell "assume", ass you and me. ;-)
Are there any thoughs on the mounting of the probe. Good, bad, or
indifferent?
Ken(KP)