[RUNNERBUN]

I used just ordinary solder, working from the bottom (underside) is easiest so you don't have any trouble with grinding out the deep pitting to obtain a good surface for tinning before applying the solder. You will be the only person who knows it's there.
If you apply the solder from the top side be careful that you don't have to high of a build up that may clash with the dippers on your connecting rods.