Ventus rigging advice, please?

I've recently started flying a Ventus2. I can't rig the thing without a lot
of
struggle. The trouble is, there's a cover above the spars and you can't see

anything once the first wing is in.

I struggle to get the second wing to fit, never knowing whether it's a bit
too
high or a bit too low. The ground is uneven and sloping, which doesn't
help.

I hope some Ventus owners can give me some tips, please?