I'm trying to figure out every possible thing you can make without adding any other ingredients from cobblestone, on a world that is using the big 3 tech mods (Buildcraft/IC2/RP2)
So far on my list I have :
Brick Stairs/Cobble Stairs/Stone Stairs
Cobble half steps/Stone half steps
Any step that requires sawing doesn't count since it eats up sawblades which I count as an ingredient. Heating in an oven or crafting doesn't count.
I was THINKING about nerfing cobble derivatives in recyclers by making them have a lower chance of scrap (since you can get cobble so easily for free). They'd still give you scrap, but only rarely so you'd need a lot of recyclers, a lot of energy to run those recyclers, and a lot of time to get a decent amount of scrap from generated cobble.
This nerf would also be used in conjunction with one that makes recyclers use a significant amount of energy (right now they use 1 EU/tick)
If you go quarrying or other mass mining you can still get lots of scrap from dirt/marble and other common blocks. I am totally fine with that, as well as cactus farms and so on. It's cobble that I am trying to nerf because the block breakers are SOOO damn quick at making thousands and thousands of blocks.