besides the ESC is there any differance betwen the the boat from r2hobbies, and the boat on ebay # 290252484982? the one from r2 looks like it has some sort wood mounting plate in back and for the batteries in the middle part of the hull but does not have the ESC, and the ebay boat has the ESC but I can not determin wether or not the boat has those mounting plates or am i talking nonsense and i can buy those at a hobby shop? thank you. thank you.