I have the same problem as "axel1989" in the Minecraft Curseforge comments... beeing sandstone and other vanilla stuff lost it's EMC value... but I don't know which mapper to deactivate... surely not all of them...
English is not my first language either... so it's a little hard
I tried a multitude of mappers but Sandstone and Bread still don't have EMC
which one do I deactivate if I want all vanilla things to keep their EMC values given to them by ProjectE? or at least sandstone and Bread

also what do I do so that all the mob powders (Blizz and such) from Thermal Foundation have EMC values?

This is my modlist... in case I might have a different problem entirely:

CodeChickenLib
CoFHCore
CoFHWorld
CTM
Forgelin
Mantle
RedstoneFlux
MicdoodleCore
OpenModsLib
WanionLib
Hammer (Lib) Core
Mike's Mods Library
Apple Skin
Just Enough Items (JEI)
Journey Map
ProjectE
ProjectEIntegration
Equivalentintegration
Equivalentadditions
UniDict
Tinkers Contstruct
Tinkers Tool Leveling
Moar Tinkers
Mekanism
Mekanism Generators
Mekanism Tools
MekanismOres
Ex Nihilo Creatio
OpenBlocks
Extra Utilities 2
Thermal Foundation
Thermal Expansion
Thermal Dynamics
EnderStorage
evtl GalacticraftCore
GalacticraftPlanets
Applied Energistics 2
Chisel
Pam's Harvestcraft
Bibliocraft
LootBags
Hwyla
Waila Harvestability
Inventory Tweaks
Simple Ores
More Overlays
Item Scroller
Morpheus

Lastly a Guide to the mappers and the customisation would be nice to go with the Mod Download :)

Otherwise awesome mod^^ thanks for making it!

I've added an guide here.
Do tell me if it needs improving, I am not the best at writing documentation.

Just a further suggestion... maybe giving water 1 EMC would solve a lot of problems... I mean there is a water recipe for pams harvest craft as well which is needed for a lot of food stuff...
I know since water is unending in this game this could make an easy cheaty EMC Machine... but 1 EMC is not much...there are even with this mod (depending on the mod pack) a lot of other possible ways to make one...
just a thought.

I found the mapper for sandstone... but when I do that water and Lava buckets have no longer EMC XD so I guess it's impossible... I still would love to see Blizz- Blitz and Basalz- Powder/Rods from Thermal Foundation to have EMC value... maybe just hard code some EMC values for some specific items of mods...
I know that would be a dumb solution :/ now I'll shut up XD thanks again for the help

thanks for the fast answer and help^^ luckily my modpack is small... with bigger modpacks this guid would take days XD
PS: the explanation is not bad though. I will look what recipe might be the cause^^