Yeah, you may have to play with your feet a bit. I am a high arch bencher, and I set-up in a similar way as you do. One thing I do is, once I place my feet, before I slide under the bar, I never move them. And I stay on the balls of my feet, but once I accept the weight I am pushing my feet forward and driving my heels down a bit. This will help you maintain your arch, and keep the rest of the body tight. At first glance, I feel like your feet are a bit too far back (but it could be b/c I do not see you using them). For me, when I am setting up, I grab the bar, slide off the backof the bench until my shoulder blades are just hanging off, and then I pull my feet directly under my knees, then I slide under the bar to set my arch, leave my feet where they are and start driving them forward and down. Good luck, and find what feels right and helps lock you down.