When you pay the Pilot cost to attach a unit as an enhancement to a vehicle unit, can you spend that cost when the unit is already deployed as a unit to make it become an enhancement instead, or do you have to pay that cost when you deploy it from your hand?
Now that I think about it, I assume you wouldn't be able to pay the cost after it was deployed because there is no timing on guidance on when you'd be allowed to change them from unit to enhancement, so I'm assuming the answer is 'no.' You have to choose whether it will be an enhancement or unit when you choose to deploy it.