Although I have a huge collection of mods, somehow i cannot make the "payloader" building anywhere! Perhaps its due to crushing industry as it adds concrete mix?

Hello! Apologies for the issue, but thanks for the report!

Looking into it now - that said, if you try changing the recipe requirement in the startup settings so that it doesn't require concrete, does that fix the issue by chance?

Just confirmed, it is due to Crushing-Industry.

CI converts the type "item" concrete ingredient to a type "fluid" ingredient; however, given that lubricant is already present in the default recipe, there are now two fluid ingredients, to which the default crafting category "crafting-with-fluid" (i.e. assembling-machine mk2 and mk3) only accept recipes with one fluid input.

tldr; removing either concrete or lubricant, or changing the "Additional payloader crafting machines" setting in the startup settings to include a category that accepts two fluid inputs will fix the issue for the time being.

Will include better compatibility out of the box with the next update.

With the release of version 0.9.2, this issue should now be fixed, and configurable-nukes should be compatible with crushing-industry out-of-the-box now.

There are also additional safeguards now to prevent more than one fluid ingredient in the payloader recipe.

Thanks again for the report!

thank you for addressing this so quick!