Test for new item tree:
|Toy sword||Short sword||Gladius|
Test for horizontal itembox (only used items will show up):
|Research Cycle||General Buyers||Suggestions|
|Toy sword > Short sword > Gladius||Items that can be suggested in place of this one.|
Cycle/Buyers/Suggestions boxes are a separate table, not another infobox to make it possible for people to insert the data themselves.
| > Right
I think this key could go at the top of the page since two of the icons aren't typically used.