Definitely heat, and a design to handle it. Ford has an issue with some Mach-E’s that the power junction would weld itself shut if you used the DC fast charger and floored the car shortly after. Once that happened it bricks the car and you gotta replace the part.
2x on the plugs and muffs. Depends on my glasses the muffs don’t get a perfect seal. And I swapped a limb saver buttstock on my skeet 1301 and my god did it make a difference in comfort.