Wow! Ive been distracted with other things and I just got to viewing this thread.
First, Like the other, I am sooooo glad that you are alright. This could have been disastrous to say the least. KUDOS on the video. It is outstanding! Thankfully, it is a life lesson and not a life long regret. Thanks for posting this lesson for other to learn from.
Secondly, the Safety Professional just kicked in. This is for everyone, so pay attention!
No matter what you do, no matter what you use, no matter how you do something, or how careful you are and your experience level, YOU
have to realize that you are your own best defense. One of the things that we used to teach in our training classes is to rely on yourself. Your first instincts are usually the most accurate. Call it what you will; a pinch in your stomach, that voice nagging in the back of your head, whatever...you need to listen to it. The mind is a wonderful thing if you just learn to trust yourself, it won't let you down.
The "voice" will shout loud and clear that something just isn't right. LEARN
to listen. Stop, back up and re-evaluate...fix the problem before it becomes one!
The lessons and the results are all over; the price of the guard vs the ED visit, the material being flung somewhere because it wasn't secured, the cut fingers because "I don't like wearing gloves" (while I handle this sharp and awkward item), or in this case a damaged blade. Bad habits result in bad outcomes!
Great job, David, and many thanks for the effort to share a mistake, to make it a positive. If it saves one persons fingers it is all worth it in the end.