device can only have the same upgrade twice.
1: Does this also apply to Major Upgrades?
2: If so, do "Add a Power" and "Add an Edge" each count as a single type of Upgrade, or is each individual Power or Edge it's own thing? (Ie, can I have an item with Martial Artist, Brawler AND Improved Martial Artist? Likewise, could I have three different Powers? Alternately, could I have the same Power with different Trappings three times, assuming all costs were paid?)