I mistakenly ordered and installed a left front arm for my SE. Everythihg went well until the very last task: screw on the propellers. The tread size of the replacement is smaller than the propeller threads. What’s more, the cap on the motor has four holes (only two threaded, I believe) whereas my SE only has two. What’s more, the arm is slightly shorter than original. Sure enough, when I checked my order (Amazon), it is an arm for a Mini. Stupid me. But the bigger problem is I cannot find an arm for an SE. Two questions, please: are the arms for Mini and Mini SE the same and I simply got a poor copy of OEM? If there are SE specific arms, where can I find one?