Well no but its pretty much common sense and well reported on the mx5 forums, the frame rails have made massive differences for all who have fitted them, the butterfly brace has improved it yet, and a cage will always do wonders, however not one person has ever gone raving around about how their strut brace has revolutionised the car. Dont be so bitter when someone else offers some input.
Ive had a full 6 point underchassis brace a front 4 point brace, the standard lower front and rear braces, an additional rear brace and a front upper brace, and i can promise since removing all the aftermarket ones i do not miss them one bit.