Tips for developing board vision, especially knights

I have been slowly practicing and climbing. 

However, I still have trouble noticing the squares that a knight attacks. 

In this recent game I was doing ok but I completely didn't see the knight threaten my queen. I've played about 1400 games in the past 6 months and gone from 100 to 500 ELO. I always play 10 minute games and try to play slowly and think carefully about my moves. 

What specific practice can I do to improve this?

Set up a board with just one knight and move it around, focusing on visualizing the squares it controls from different positions. Try to quickly identify the knight’s target squares without moving it, and mentally visualize its movement. This helps reinforce the “L-shaped” pattern.

You not tunnel visioning on taking the rook and winning his queen instead was very impressive at 500 elo. As for not seeing his Knight threatening your queen. Sometimes it happens. Knights are tricky. But as chess mastery said set up a board and drill yourself on Knight movement.

Someone said knights are terrible but I dissagree

This might help and have fun with knights. . .

Jumps to a new square each move until you cover the board . .