Pins and ramps really do come in handy when you use 10 speed chain and up.
I have a Pro 5 Vis with a SunXCD spider and a triple ring ring setup on a Jack Taylor Tandem. It worked perfectly with 9 speed chain. Upgrading to 10 speed and it didn't shift properly at all. I had to replace the middle ring with the appropriate ramped and pinned ring for middle position use and then things were fine.
Similar situal with a Rene Herse crank running a 46/30 without ramps and pins. Were slow unpredictable shifts. WIth the ramped and pinned 46T ring installed, it shifted instantaneously.
Reid