Lambda tower anti tamper top

Quick question. I want to adjust the idle mixture on my 103. To get by the anti-tamper ball on top of the lambda tower, can I just cut right under it with a dremal cutting bit, or cut to the side and pry it out? Looks to me like I might be able to just leave the tower in place (instead of drilling out the 2 screws that secure it), cut carefully around or beside the anti-tamper ball, pry the ball out, then proceed with the normal procedure. Any reason I shouldn't do this?

Thanks in advance.

Wayne