If you have to, put your tang screw in a drill press and file it under the head while spinning. This will allow the screw to be timed. Just go a little at a time until it is right. Given that your gun has been restocked, that is most likely what is causing the screw to not time as it was originally. You don't want to muscle it into place since that is what will cause a messed up screw slot.
If you cannot find a trigger spring or make one right away, don't sweat it. The gun will function without it.
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B. Dudley
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