Hi mate. Not sure how old you are but in the 90s anything and everything could be nicked seemingly so im not so confident. I honestly think a multiple prong attack is best way. IE no one thing. At mo I have that disklock and the VW total closure system that I have no idea if its any good or not. Another great defence is a garage. Out of site out of mind. How I would love a Mul T Lock.
People dont seem to p[inch cars as much these days. Like I say it was an epidemic in the 90s. Thank god for Playstations and facebook and social media sh!te. Made everyone housebound. yeeeey
When you say a chip, what exactly do you mean? An immobiliser