I’m putting a batting cage in, in the backyard. I’ve got exactly 42’, I want to put 4 poles cemented in, to make a 10x10x40 cage. Do I need 2 more poles in the middle or should the 4 be enough? I plan on running 2 wires/cables on the 40’ runs so I can attach the net with d-rings so I can move it easily to cut the grass. An ideas/help would be appreciated.