I have a crafting based character with the Valet Familiar archetype meaning I always craft with a cooperative crafting buddy.
A friend who also has a crafting character has started using Amazing Tools of Manufacture.
So my question is, by RAW how would these two things interact under the two following circumstances.
Crafting a potion worth 4k, would the tools and cooperative crafting stack making this only take a single hour? If so would the tools be used up for the day or would it count as at the 2k limit but not over it?
Crafting an item worth 20k, how much progress could be made in a single day? I've been assuming 5.5k as if you break down the hours you normally make 500 gold progress an hour, assuming you bump the DC by 5 so you craft in 4 hours instead of 8. So if one hour becomes 2k then it would be 2k+(500*7)=5500. Is this correct? Can the tools be used by one person in the first hour and then another on the second?
Answers would preferably sit in the RAW as my GM tries to stick to that as best we can and only nerfs things if they are breaking the game.
They do not interact at all.
The tools are used to make mundane masterwork-quality items. While when creating magic items, the mundane object should be present before you start the process.
It then follows to explain the differences and bonuses granted by the item:
Although the Magic Item Creation rules say that you can use another skill other than Spellcraft, the method of crafting being used is not the Craft skill.
That means that if you do everything by yourself, the process is much shorter, as creating masterwork quality items usually take much longer than enchanting with magic.
For instance, crafting a masterwork (+150 gp) full plate armor (1,500 gp) should take over 10 months for a single character with about +10 on his craft skill, as seen on this calculator. The tools make this possible in less than a day.
You do receive the tool bonuses for using the Craft skill to create magical items though. That is the point of being able to use a different skill other than Spellcraft.