Originally Posted by
gthomson
Bingo, bango, bongo - took all (or most) of your advice and a decent tap on the wood and unstuck the expander wedge. When I took the stem out there was some surface rust so I cleaned that all up, got off that light mount and then greased the heck out of the stem and put it back together. Now I can show off my new handlebar bag which was the real reason I wanted the mount off.
thanks all
As with many endeavours mechanical, you have to develop the requisite skill and experience that gets you to where you intuitively know when to switch from careful mode to hammertime, sometimes there's a lot of ground in between and sometimes there's not.
Always proceed with caution while looking for the opportunity to get after it when necessary.