Which controllers would you recommend? I guess with normal joysticks the spring is too strong?
Value for money and value for use this is the best helicopter joystick on the market and it's everything you will ever need . You can learn to fly a real helicopter with this it's so good.
Otherwise you need to buy a joystick and remove the centering springs.
if you want to get serious and master rotary wing flight then the pro flight is magic .
If you get hooked and you have cash to burn then :