Works just like character-scale combat, with the following exceptions:
Drive Skill: Whenever you make a physical skill check (dexterity,
endurance, or strength) from a mech, you use your relevant skill
your Drive Skill, whichever is lower. Without the proper mech operation
technique, your drive skill modifier is treated as 0. For example, if
you are trying to make a Dodge defence, and you have a +6 acrobatics
modifier but only a +4 drive modifier, you would use the +4 bonus.
Use the mech's stats in place of yours. Use the mech's strength,
toughness, size, scale, speed, etc.