An idea of the picture - a scaled shot 500k setting @ 12.9 iPadPro:
I followed the same road, started 9.7,
plan on friends PC and transfer via cloud,
we moved to yoke RAM mount 7.9 mini,
were disappointed to find it disturbs the autopilot,
finally got a 12.9 second gen Pro for planning,
sold the mini and use the 12.9 Pro now in flight,
and for planning as well.
Nothing beats screen estate ...
The iPad also raises SA when not mounted,
looking outside did increase ...