Also suggest you buy one of the grippy tools. The bolts are not that hard to remove with the right tools. T handles are the way to go. A lyittle heat helps also.
Good to know that the T handle 4mm hex will work with both the E5 and the E7SE.
I have a Weller WESD51 Soldering Station; about the best money can buy. I have a wide tip on it. Even if I heat the screws to 800°, the screws won't loosen. The only thing that's work for me is to torch the screws. I was still only able to get one of the screws out; I just left the other screw alone. Yes, I have all four size Grippy's, and I was still not able to get the other screw off. I have two E5 kits; same experience with both.
I enjoy an excellent flying experience with the E5 Synergy kits, and expect the same with the E7SE kit. However, I don't look forward to having to remove the feathering shaft bolts.