yes its safe
well the lock mechanism has small plates and balls in it...
what the chabiwalla did was he changed the combinations of these plates and balls
so even if some1 found my lost key it would be useless for that person as i would have the new key made with the new combinations
if you would have been in karchi i would have taken you to the guy who did it on my car
the only thing id say to you is dont just give it to any road side chabbi walla .. get some reliable person to do it
btw konsi car hai aap kee