Wazzup!?

A friend of mine challenged me to compact/redesign MinecraftPG5's version of the key locked door. This is what I came up with. ENJOY!

My contraption has the dimensions 7 *5 * 6 (Counting floor level) = 210 blocks
PG5's contraption has the dimensions 10 * 10 * 6 (Counting floor level. Not sure if I counted correctly on PG5's. Please correct me, if I'm wrong.) = 600 blocks

Which means my contraption is about 50-60% smaller :)

Additional Notes

Disclaimer:

I did only use the idea. I haven't taken any actual work from PG5. I completly redesigned the contraption, which means I made it all by hand by myself.