good question.....we has been experience before.it will be depend to the installer how there do it. but the correct way is arm the alarm then the engine still running after just switch off by the timer.
I am keen to buy a late model, preferably 1999+ FD half cut (i.e. RS, RZ, spirit R etc) in good condition. If anyone has one available, can source etc please let me know. I may consider others.