This is mostly a stand-alone version of Dytech's Large Chests.
It adds 2x2 and 3x3 chests of each type, and makes chests use weaker material chests in their construction.
Unlike dytech, all the chests use normal vanilla materials.
All chests are built with the lower level chests of the same size, in addition to their normal cost.
Larger chests use the next tier of material if it exists most of the time.
2x2 chests cost 4x times as much as 1x1 chests, have 2.5x capacity and 2x health
3x3 chests cost 8x as much as 1x1 chests, have 5x capacity and 4x health
2x2 and 3x3 Logistic chests use 3 Advanced and 1 Processing unit, or 15 processing units.
Iron chests get +1 +5% physical armor
Steel and Logistic chests get +2 +10% physical armor
2x2 Chests get +5% Physical armor
3x3 Chests get +10% physical armor