Ways not to lock your bike

ah, common sense. I assumed maybe a smaller BB would make it slightly easier to apply acetone, in case I need to remove afterwards.,.

They would be very easy to lever or knock out then. As it is I don't think it's the most secure solution - I think if anyone had a bit of a go at it (hitting it or using a pin or whatever) I'm not sure it would put up that much of a fight. It's more to deter opportunists in the hope that they move onto the next bike.