Nice move on the extra body, it really makes a big difference. Throw the 100-400 on one body, and a wide prime on the other. Nothing you can't shoot.
Yeah, that's the plan. Paid $995 for a 7D2 with less than 7000 clicks on it. I'll have the 100-400 II on one body and the 500/4 II on the other while birding. I do have a 6D for regular use.
I also renewed my gym subscription and stepped up my shoulder and traps workouts!