In the promo images on the mod page, I can see the Bucket Wheel Excavators showing small pipe-to-ground graphics denoting their Sulphuric Acid inputs. In my game, I don't see the pipe-to-ground graphics. There are just floating flanges where pipes can connect. I'm using Factorio 0.18.34, so it might have to do with the changes to Mines.

Yes, input_fluid_patch_sprites has no effect anymore. Looking at the vanilla Mining drill, adding them back in seems to be a royal pain

I see. As an alternative, is it possible to build the pipes into the model and just rotate them when rotating the entire structure? Either way, though - here's hoping for a fix. Your mod looks honestly pretty cool.