dont have it welded! I had an 850 nad a 1998 V70 door strap welded and both broke in less than a year!
I followed a repair that called for removing the door( very easy, 1 torx lock screw on each hinge and one on the wireing to the door) undo the one on the wire feed and twist it and it will unplug then undo the torx on the hinges and then you can just lift the door off. You need to remove the trim at the foot kickplate area on the interior area.
You need to drill out the existing spotwelds one at a time and then fish a 6mm x 15 mm bolt through with large flat washers to hold everything together.
There had been a very good write up at
http://webspace.webring.com/people/mo/ozbrick/door-stay_fix.html#steve
unfortunatly the pictures are not there anymore, i have done this on 3 850's and all are still working.
If you contact this link you may be able to get the picture link, it really is an easy inexpensive fix.
I will try to post a picture of my completed repair.
Bobd