I'm in the process of removing the Bolton (Area 13 shock).  The installation went fine.  I had to install the spacers for the brakes and longer screws, but no big deal. 

The issue I'm having is something about the bikes geometry is off and the turning is very squirrely (can't ride with no hands).  I've adjusted the handle bars several times, but it just doesn't feel right. Area 13 has agreed to accept my return and I've informed them I don't believe this shock fits the Rad Runner II properly.

I'm surprised you like the Bolton Shock on your Rad Runner II.  I've found it to be unrideable.  Anyone else have the same experience?  I'd love to find an option that maintains the same geometry.  Thanks