I finished the Infinite Cobble/Sand/Glass Room in town. It's next to the Enchanting Room. I'm still tinkering with the engines. They're overpowered with as many solar panels as I placed (blaming the Wiki for being misleading on the capability of Redpower 2's Solar Panels with Blulectric Engines). I'll likely remove some of the panels and see what a good balance is. For the time being, it's a delicate game of turning the engines on and off every short bit while waiting. The machines would be fine, but the pipes will explode if the engines are left running due to how quickly the engines build power. The Filters are set to take quarter stacks, but I need to get Timers in and set a pulse yet. It's a work in progress to perfect it, but the room is certainly functional for those craving sandstone/glass buildings.
Edit: Found my solution, but won't get to building it tonight.