AromaCore/AromaBackup

[Incendiary]

I'm a little confused, on the forum page for these mods it says:

Note: This mod doesn't have to be installed on Server and Client. You can still join servers which have that mod installed with a client without that mod. You can also join a server which doesn't have that mod installed with a client with that mod.

But I tried hosting and joining a server with both mods enabled on the server and not in my client and I get an error "Missing blocks and items", I presume this is due to the wrench, but I'm wondering if I'm missing something that will allow me to have aromabackup without making all my players edit their mod packs?

If this is already resolved somewhere, sorry I missed it, I couldn't find anything like that. Thank you in advance.