@ localfreerider: thanks for the edit, and great find on the video. Thanks.
@ Katlyn Cage: Noted. Thanks.
@ Kwokwai: Stay tuned, I might be reaching out to you shortly via PM.
Update: I will be filing down the (clearly mangled by a previous owner) slide notch so it has a sharp 90 degree (rear-most) corner in the next couple of days, and will update with results.