Originally Posted by
Homebrew01
If there won't be much stress on the weld, since it's just a spacer, then it should be fine with a few tack welds. That will minimize heat and possible warping.
If it is just a spacer, why does it need to be attached to a cog ?
A spacer that is supporting the third cog which is only partially on the freewheel body. If it is just a spacer then a normal spacer would be used.