Lucky cat <3  And those GMK surprise caps are great!
I had a surprise cap of my own!  Mr. Nubbinator sent me one with these cryptic words "see if you can figure out what's special about it".  I was intrigued!
This morning, the USPS delivered a small package where I found this little guy:
I thought hrmmm  what could be special about him... Let's see, I love the color.  He's got a lot of detail, like the wrinkles:
and there's even a signature imprint
He's a little sad looking
But what is that special something?..
Then I finished taking photos by my living room windows and went to get my phone, as I was getting a phone call, while holding the cap.  As I was talking on the phone, I looked down.... 
and well...
I saw this...
He glows!!!!  

  Like a lot!  Super radioactive cyan! 
He's going to take an honorary spot on my LZ-GH once it's reassembled, where he will have plenty of LED goodness around him 

  Thank you, Nubs!!!