hi aldous

it is of advantage, if you can use a 3d cad program.
so you can design flowing transitions.
which uses you?

by top- and site-view i has the important reference-scores.

in addition, from this i design the frames, somewhat more complicated, but it will go!
i will manufacture these first with thick cardboard and on a railing set.

if everything is correct, I transfer these on the wood.

cheers
rceris