Yeah, I've got about 15 chests of cobble. You're welcome to take a large quantity (10+ chests) if you'd like.

I like the various industrial mods, but I'm wary about them because of balance. I try to keep everything in the game very balanced in terms of effort to obtain. I find that balance like that is important to keep everything we build 'impressive.' Some of the production mods eventually get to a point where you might as well be playing in creative mode. That seems like it would cheapen the development that has been done. The only time I've been ok with a system that does stuff like that is the sand generator, and that's just because obtaining sand/sandstone requires strip mining the deserts which looks absolutely hideous and ruins the area. I figure the sand generator is an acceptable sin to avoid the strip mining desert blight.

I've never looked at Power Craft specifically, so I'll take a look at it and see if it looks balanced for the server.

Alternatively, enchant a diamond pickaxe with Efficiency IV and then chug a haste potion. Stone will evaporate in front of you.