WELD ON OR BOLT ON?
It doesn’t really matter. They both have pluses and minuses. A rotor that is modified with a weld-on weight can fit in tighter ignition cavities and is as reliable as a standard rotor. Weld-on weights have to be sent away to have the work done (or suffer core charges). Bolt-on weights are more affordable and seem easier to install (but it isn’t always true, because some bolt-on weights require drilling).