I will tell you that it's not a permanent fix and to be honest your boat likely has limited days afloat. That crack happens with excess weight in the bow and flex in the boat structure. Now that it is cracked, it will happen again. When? No telling. The weld will be stronger than the surrounding metal and eventually will likely crack along each side. The heat from more than a couple weld attempts will compromise the joint at the joint of the keel and sidewall and it will leak. I've got the exact issue and am babying my boat until I can replace it. I'm on my second weld attempt.