First of all thanks for this mod. It's a helpful idea.
Some of the switches are confusing to me. In general, doing the opposite switch (Tier up <-> Tier down / next item <-> previous item) should bring me back to the item I had before. This is not always the case.
For example, scrolling through the chests, I am in a cycle with the basic chests in one direction, where in the other, I get to provider chest and further. Another example: Going "down" from the foundry gives the electric furnace, but up again I get the stone furnace, even though they do similar work.
Personally, I would like the option to have the mapping go alongside the item order in Factoriopedia. That is, navigating through it's grid naturally, per item group: Right is the next to the right, down is the one below, etc. Seems to be another stance, though.
