Regarding the angle question, it moves about 20 degrees each way. Most truck snow plows have a cylinder on each side, which increases the angle available greatly. With a single cylinder, you would need a multi stage telescopic type to duplicate that. $$$$$$$ I use the same cylinder to angle my 6' landscape rake, again which works for my needs.
I can also pin the plow when removing the cylinder, which gives me about 45 degrees each way, but I have to get off the tractor to adjust it. I like the ease of controlling the angle from the tractor seat, and that works OK most of the time.
WALT