I couldn't really give a fuck about the weight.
If I was that concerned about shaving another few kilos off the cars weight, then I should be ploughing my money into a race car, and not a track day toy.
Mine was built with a full alarm system in it, tracker, disklock, loads of manual security measures etc etc...........
........... do everything you can to put them off - this is why:
That's my car, 3 seconds after the alarm went off. Clifford, Disklok, CCTV etc etc................