The front guide cracks right where yours did in almost EVERY case. If you remove the thing, turn it over and look at the back. Bend it a tad and almost 100 percent of them that you look at will show a crack when you bend it a tad. Later, it can just fall apart as yours did and fall down the well to the pan. Doesn't hurt much if you can just fish it out of the pan.
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!