While the first change has been on the PTR for awhile now, it seems to have gone relatively unnoticed. The old Field Repair Bot 7A has had its mats decreased and is now stackable. The new mats, as pictured above, are 16 x Thorium Bars and 2 x Fused Wiring. I've been able to make a few bots on the PTR and can confirm that they also stack up to five.
In addition to the recent changes to the latest PTR build, players are reporting that additional items can now be stored in the Fel Iron Toolbox. The new items include motes, primals and blacksmith hammers. The storage of the elemental ingredients will definitely help out while attempting to maximize bank space. Let's hope that this change was intentional and doesn't get reverted in a future patch.