Hi All,
When I have made this type of stay in order to get the flattened parts even on both sides, I make the stay in two halves
Make the flattened section over length
Its easier to shape the curved section in two parts like this,
Cut the flattened /curved parts to length, then weld them together
Add a sleeve to the fork ends of the tube
so you get a thicker,stronger part to drill through
John