I upgraded from PP Classic to Stargazer in the past few weeks. Before upgrading I called PP to check on the ZO emulation, which they assured me would be a simple code upgrade for existing Stargazer customers when available. I can certainly tell a difference between SG and PPC, mainly in that if throttle position isn't just right, you will get a fast first segment while it levels itself out. If throttle position prior to the 55's is perfect, it pulls a great pass. I'm ready for the ZO emulator, and in theory this seems to be the perfect compromise. Boody makes a good point though, my concern is that mechanically it may not be able to keep up. If that's holds true, the ZO emulation of SG sounds like the way to go. Either way, that suggests all PPC users should be considering the upgrade to SG