Recently I have been writing code for a program that calculates the HP, Hardness, and Saving Throw Bonus of a given piece of equipment when you input the equipment's level and type (weapon, armor, computer, etc). This has caused me to question how the crafting rules, and other effects that state they increase an item's effective level, do or do not stack.
Here is a list of things I would like some clarification on:
1: If a weapon was crafted by a PC and later imbued with the Durable fusion, do both benefits stack to grant a total of +7 to the effective level?
2: If a suit of armor was crafted by a PC and later had the Tensile Reinforcement upgrade applied, do both benefits stack to grant a total of +7 to the effective level? Though clearly given the way the upgrade is worded, it doesn't increase the armor's save bonus.
3: If a PC were to buy a weapon manufactured by Multifold Industries and then imbue it with the Durable fusion, would they use the Multifold Industries calculation method and still treat the effective level as 5 higher?
4: Does an item (that is not a weapon or armor) have to be described in its respective entry as "sturdy" for a GM to use the better HP and Hardness calculations, or is that simply at the GM's discretion?
5: In Armory it says it's possible for a PC to make weapons with the benefits of any Manufacturer listed. Does this mean it is possible for a PC to make a weapon with the benefit granted by Multifold Industries weapons? Would the item in question still gain the +2 bonus to its effective level?
6: If 1 and 5 are true, could a PC stack the benefits of making a weapon themselves, grant it gain the Multifold Industries trait, and imbue it with the Durable fusion, granting a total +7 to the effective level and the ability to use the Multifold Industries HP and Hardness calculations?
I ask these because I'd like to be able to account for them in my program, and also so I can give suggestions to players on how they can safeguard their favorite items against being destroyed.