The ISU contains compass sensors; so
the same precautions as mounting a
compass apply as far as magnetic fields
are concerned. The Installation manual
does a thorough job in specifying
minimum distances from magnetic
sources such as battery wires, speakers
and compasses.

I relocated my battery selector and wires
to the bottom of my panel. Happily the
fuses were already there. The radio was
also moved down into a hole vacated by a
Cambridge. The boat compass on the
glareshield was tossed - the hole now
accommodates PowerFLARM antennae.
In Canada the Air Glide qualifies as a
magnetic direction indicator.

Then there's the geometric requirements. I
leveled my glider according to the
Maintenance Manual directions for CG
measurement. Don't expect the panel to
be 90° off the level flight attitude. Most
likely it will be something else. Those with
a tilting panel with access behind the
panel accomplished by removing the
canopy and glareshield need to support
the panel with canopy removed in the
same position as when the canopy is in.

I cut a basswood plank from a hobby shop
for the ISU platform with bevels to fit the
panel and other side of the instrument
binnacle. A foam block raises the ISU to
just below the glareshield.

Once you have the ISU on the platform
and hooked up to the vario with the glider
leveled, you can use the info boxes to
show pitch and roll angles. Shim to get to
zero.

Nothing better to keep a glider
owner occupied over the winter.