The ORCA is used a fair bit here in Sweden and is an awesome esc.
Everyone I have spoken to that has it is really impressed.
Even the new ORCA motors are pretty good, run a bit hotter than the previous motor (I think due to the case) and are about 20gms lighter than anyother motor (due to case I think)
Hacker motors Im not sure about and I think the MM esc are rebranded Reventon pros
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