Just made your own simple mod.
Open the Mod Editor > New Mod > open your Mod > "New Item" > "New Game Value
-Name that "Value" Comment if u want to
- Category "Drone" (there is where some Category Loading issue came up on my site)
- ID DroneHubOrderDroneRange (if the value doesn*t show up - welcome to my loading drama)
- percent (editable) integer (number/value)
- amount (editable) integer (number/value)
- Modified value = result of your math (percent + amount)
I highly recomend! Do not overdue it!
-75 percent works fine for me
- 100 think works to ( = Modified value = 100000)
- 150 buged on my site - perhaps some other values i changed that try
and at last

repeat that just change the ID "DroneRechargeTime" or something else
(Never Change to much - have fun to find the wrong entry if you do)
Greets !