I toned them down. How is this?
Rented Weapons
Cost 8 Turns
Common
4 hours
+2 temporary attribute points for a single ship usable for Bronze Cannons or Cannonballs. (Limit 10 in attributes) (No stacking)
Borrowed Defense
Cost 4 turns
Common
8 hours
+2 temporary attribute points for a single ship usable for Copper Plating or Iron Scantlings (Limit 10 in attributes) (Maximum 2 stacked)