I couldn't remember the details (that's amazing Klaus), but I do remember this thing is stubborn. And I do remember the curvature was exactly opposite what you want it to be. I wasn't confident I could get it to engage without ripping it apart, as it sounds you did. In the end I seem to recall the trick is Klaus' technique. I believe I also powered it up without some hardware, and it pushed itelf apart as stated. Perseverence comes in handy with this thing. I did mine alone - having an assistant sounds sublime. Good luck.