Modified Slingshot for FoilDrive (first build)

I’m currently on my first build for my Slingshot Hoverglide.

I often read that the backwing of the hoverglide needs a different angle of attack. Are there any empirical values ​​by how many degrees the backwing needs to be trimmed?

@Bzhwindtalker: Have you already trimmed your backwing? Can you show us pictures?

THX