I don't think any of the braces on offer for the coop are as effective as they could be.
Partly true....
A simple, straight brace between the front wishbone mounts makes a noticeable difference to steering precision.
However, if the subframe "legs" are capable of moving closer together under acceleration, and further apart under braking, they MUST be capable of deflection in the same direction when cornering hard. IMHO, simply using the two front wishbone mounting points won't give enough stiffness - the front mounts would have to be triangulated to the rear wishbone mount on the opposite side of the subframe.
So - instead of
I could have built something more like
However, the cost would have been close to double the amount I had to charge for the straight brace, which would have made it far less appealing.