Hi guys,I´ve been offered an electrical alarm which when connected operates a siren sound (120db)when the bike is slightly moved.I´ve been offered this device half price e50.At first I thought yes,but now I´m not so sure,if somebody really wanted to steal my A10,they´d have the knowhow how to disgingage the alarm,even if hidden.So why question,how often are oldtimer bikes stolen,bearing in mind,most riders invest in heavy preventive measures.Would this alarm really make a diffrence,whats the general view ? Should I or should I not buy the alarm ?