I was messing around with RFTools today, and was trying to make a door. I thought that it would be neat to use elevators to do so. Unfortunately, elevators don't work the way I thought that they would.

Essentially, this is what I'm requesting:

When you activate the bottom Door controller block, the door will slide downwards (similar animation and sound to the elevator) When you activate the upper Door controller block, the door will slide upwards.

The same can be done horizontally:

I think that this would likely work well alongside the rest of the blocks in RFTools and would add a great deal of functionality to the mod.