Angle grinder with a diamond blade will chew it away nicely
When I did my 180 I did this to my euro brace 1/2" glass
And cut the straight line freehand slowly with the angle grinder to get this
Now I won't lie their can be a bit of chipping but you can smother it a bit with a belt sander and water carefully
Another option is to use this on a router and set a straight edge again with slow careful motion I used this when I built my 50
And got this result
I never worried about the rough edges as I covered that side with black acrylic to make overflow teeth.
If you have question don't hesitate to ask