I used the simple expedient of buying the equipment for the PC, then "selling" it for 0 credits, then adding it to the drone using the "buy for free" option. It all balances that way.
Also, it took me the longest time to find where to edit the drone. If anyone else is looking for it, you need to click on "Characters" in the upper right corner of the screen, then select your drone there. Don't try to manually create it as another independent character. That won't do what you want it to.
http://returntoredbook.ttrpg.teaandd...7s%20drone.png