Air flow is what I'm concerned about. The ESC is, of course, behind the firewall and under the battery (which I have suspended, no contact between the two). Do I need to, or is it advIsable to slot the firewall and the bottom of the plane (Sky Raider Mach II) at the back end of the fuel tank location? Or, will a 70 or 80 amp ESC not going to get hot enough to require those mods?</p>