I have an aftermarket aluminum radiator from a previous owner on my Elise, I'm almost certain it is from wizard cooling based off measurements. Im still trying to figure out exactly where. but it has a small pin hole either on one of the cross pieces of the core, or where the cross section mounts up to the end caps. I'm wondering if I were to find it is there a decent DIY I could do, or if it has to be welded. Also if it has to be taken to a proffesional does the cost of the repair usually come out to about the same as just buying a new one?