Help with background and composition

I am new to shooting stuff in a "studio" (in quotes because all makeshift in my case) setting and am struggling a bit with composition. I set up a small space in my basement so my girlfriend can do areal arts (think lyra hoop stuff), and I want to shoot some photos of it. Equipment: Canon 60D, 18-55mm kit lens (for now), two speedlights, backdrop.Basic studio setup looks like this: http://ift.tt/2C6Cw37 want to shoot on black to not have to worry about shadows, wrinkles, etc.Test shot: http://ift.tt/2EdE9Ck problem I am having is that as she swings around, her limbs continuously extend outside of the range covered by the backdrop. Typical settings:Shooting from usually 5.5-6 feet up, 35mm. Max distance I can be away from the point where she is, is 11 feet (wall behind that). I can angle things somewhat, but I run into other issues with the hoop placement when doing that.I realize I can get a bigger backdrop, or move it slightly closer to where she is, but is there a way to tweak my composition to make it easier so I don't have to constantly edit out limbs? Move closer and deal with the fisheye effect perhaps? via /r/photography http://ift.tt/2C3kU8l