Hi Malcolm,
I should have said.
You need a really good incidence meter to set up bipe wings. Probably a good digital inclinometer is needed.
We use an Aeroperfect - unfortunately they are not currently available.
You are measuring in at least six places ,roots and strut points, so the cumulative error from crude readings can be great.
The meter should be as light and well balanced for tip readings as these wings flex a little very easily.
Brian