best place to mount shock sensor?

hi all,

just thought id post this new info, i recently tested the output sensitivity on differnet parts of my car, a falcon and my girfreinds car a toyota celica (Smaller sportscar)  In my falcon sedan  (a larger Family car for those who have not heard lol) the best response for light contact ie someone opening their door onto the car or a cat jumping onto the car, out of five different locations was when it was mounted to a part of the steering column plastic cowling which protruded. (another great place is the Cabin roof in the center but involves removing lining, arrrgh dont do :<)To find this location i sat in the car and watched and felt for shock waves with my hand as wither someone threw my cat (wont come near me now lol). or literaly had a door touch the car (hence chip marks) Quiet clearly could i see the plastic covering vibrate almost like a tuning fork. where as in the Celica the best location was a steel dash mounting bracket inside the cabin of the car.

The locations for the falcon where: a) Firewall directly screwed on b) Ignition wiring harness above foot pedals c) The steering column itself Ziped tight onto a flatspot d) the cabin roof  e) above mentioned plastic. For the Celica a) steering Column b) Large wiring harness c) Cab roof d) Firewall e) Dash Mounting Bracket

Well thats my results anyway :) Thankyou