If the part can handle the heat, getting it cherry red and then slow cooling it should soften it and make it drill/tap easier. Quality cobalt drills and a good tap will make a difference too.
Maybe a question for another thread, but.....Is there a "soft" MIG wire or is the hardness a product of the process? TIG welds are workable, why are MIG such a bear?
There is a wire called Easy Grind. I have never used it and yes the process of welding TIG and MIG heat the base metal differently so MIG cools faster hence a harder metal than the TIG that heats the base metal more so it takes longer to cool.
