Nothing to it did one on a friends Terrova.
I bought the V2 with the Ipilot.
The Terrova is a much better platform for the Ipilot do to it`s shut off in the stowed position.
The GPS in the Ipilot stays active with the V2 unless you unplug the motor. Draining the battery.
Before I`d buy a Ipilot to upgrade the V2 I`d strongly consider getting a Terrova with the Ipilot instead.