Well for my next test with props, I tried some Dobby ones.
Had to fix a small piece to dobby prop holes as they were too big for the S6 posts.
I used very small tube from a pen! which fitted just about right and still left them loose enough to move.
But trying to fly with these props did not work that well.
The dobby props must be a smaller pitch angle than the S6 props and it only just about got off the ground.
I think the Dobby uses the same KV rated 4300KV that the Wingsland uses.
The dobby weighs a lot less than the Wingsland and so I assume the props dont need such a high pitch angle as the original S6 ones.
So need to find some other props to try.