I don't have any more pics at the moment, will try to get a few. The CAT sits a bit high at the pin with stock 12" tires (I think 8"...normal is around 7"), so the back of the bucket was an inch off the ground, but now it's a half inch with a cutting edge. If I remember correctly the edge sticks out about and inch past the rear corner and when you curl the bucket (with boom all the way down) the edge makes contact with the ground, but does not dig into the ground - so you can shave high spots, but cannot actually excavate/dig. On another machine that has a lower pin height at rest it would actually remove soil.
The difference in spreading gravel is like night and day. Curl the bucket slightly upwards and travel forwards, then reverse with bucket almost flat.
Oh...just remembered that yesterday I was grading out the inside of a pole building for concrete slab prep and ripped out a 4x6x10 treated piece underneath the open doors going in reverse in creep (4 ton machine). That edge really grabs stuff so you have to be careful.