How can I make a reliable piston door?
Solution 1:
One easy(ish) solution is to use a sand door. You can make them as wide as you would like, and about 3 high.
Here's one design that should work with the XBOX edition:
If you want to do some searching, what you want is a tileable triple piston extender for Minecraft 1.0.1. Or, if you only need it to be 2 high, then you only need a double piston extender, which is quite an easy design.