When I install them I might have to set up a piece of string, tied to the same points as the strut brace in the rear of the cabin where it can be viewed by a passenger observing it while I drive. If the strut brace bends under load while cornering, the string will go slack and I'll know I'll need something stronger. To test the one in the front I'd have to borrow a race cam off someone, although I'm not sure they're suitable for dealing with under bonnet temperatures. The other way to test the front one would be to remove the bonnet and do the string line trick.