All the Bridi kits were this way. I suppose BlueJay didn't change anything?

If you've built a few kits, they are straight forward. The bottom of the airfoil is straight from midpoint to trailing edge on the bottom.

There are shims supplied to make the wing straight.

I have the plans copied at the printers and work off the copied prints - saving the originals

You will find a detailed build with hundreds of pictures somewhere on here. I'm thinking kits but it may have been Senior Pattern?