Some crafting recipes require items provided in the mesecons modpack like the glue item used for the technic:solar_panel. There should be a dependency on whatever mod adds that in the mod.conf file or there should be some code to check if this mod is installed then use the usual crafting recipe and if it isn't then use a different one instead and have that mod as an optional dependency. I can make a pull request of what I had in mind if you want depending on which of the two you want to do.
Some crafting recipes require items provided in the mesecons modpack like the glue item used for the technic:solar_panel. There should be a dependency on whatever mod adds that in the mod.conf file or there should be some code to check if this mod is installed then use the usual crafting recipe and if it isn't then use a different one instead and have that mod as an optional dependency. I can make a pull request of what I had in mind if you want depending on which of the two you want to do.