I pretty much have the same set up, but my 4074 is a 1400kv. I'm trying to put the new motor in and and found out, the hard way, that the Leo has 25mm motor mount spacing. It's too narrow to fit the stock motor mount that held the dynamite 1800kv. But it looks like you used the stock motor mount with your 4074 huh? Wondering why mine is different. Any ideas?