I actually never welded a drive shaft I found the passenger side to be fine but for the driver side I bought Jackshafts from Yahoo Japan Auctions and I have to use camber bolts as it was still a tiny bit short and gave + camber. Many others have Cut n shut the drive shafts.
The cups don’t make up the difference.
Here is a link to Ceilee’s thread. You will probably find that most helpful.
Also here is a Link to my old Move Thread. Just incase there is something useful in there.
Also a link to my Budget Track hack I had where I did a 4x114.3 conversion.