hi i am looking to buy one of the cylindrical roller hoppers like the lobster one or wilson etc. could any one help me out here. I have a massive bucket of balls that i bring to the tennis court with my kids. there are probably about 500 balls in the bucket. (we are yet to make a substancial dent into the entire mass of balls.) We play a game where you are aiming down the middle or wide on the serve and the one who comes closest gets the point. You play until you are either to tired to go on or when u run out of balls, which we are yet to do. All of our serves have improved tremendiously. Unfortunately, after we have to pick up the balls. We have a gamma hi-rise that holds 75 but its a real pain to pick up all the balls. I think that the roller hoppers would help. Has anyone used them, and if so what are the pros and cons. Thank you.