I have a White Water that I'm shopping right now. Other than all the interlacing ramps it's really not that bad to shop. Time consuming yes, but not difficult.
I had a NASCAR and removing the left and right ramp were a complete pain in the ass. To remove the right ramp, you had to remove the left one first which was easy enough, but then the right side wrapped behind the PF and was all one piece. I swear the ramp would be 6 feet long if you stretched it out straight.
My first pin and still a goodie was F-14 and getting under the diverter was/is a pain in the ass. You have to remove 4 habit trails, including the main one from the shoot lane just to get close to it. No wonder Yagov is so pissed all the time.
I think each pin has its difficulties. At least one section that is tricky.