advise on my electric setup

[Metallover]

sounds like a solid setup. You'll get great runtimes. You can also choose a motor a little higher in kv if you only plan on running 4s, but that will shorten runtimes a little.

Except, are you wanting to run 2 4 cells in parallel for 4s 8600mah? That's a heavy battery right there... Or do you mean two 2 cell 4300 batteries in a series?