Welding on Type 4 Case- Possible ?, Welding on Type 4 Case- Possible ? Options

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All,

I had to have some work done on my case ( long story but was never given advice by so call expert machine shop).
Upon returning to pick up case, machine shop pulls out the case and says that it's not finished and it's real 'hard' ...as in there's pin hole leaks around the weld.
When I looked at the weld, I mentioned that weld looks like a young child weled it. Person mentioned it's one of there "new' employee's job _:(.
He goes no and says that case is 40+ years old and every case is different and they figured that 1 hr of labor and now has 4 hr into it ..but will 'try' to fix it. My reply was -if this is a difficult job-WHY did they let a new person butcher up the weld job. the weld job is about 1 x 1/2 inch long near the rear of the case....Need some expert advice here _:(. Thanks in advance .. (IMG:style_emoticons/default/sad.gif)