I'm looking for more precise calculated cruise power settings for my 310L, above and beyond the power settings shown in the POH. For my year 310, the POH does not take into account OAT and PA. I know newer model's POH (ie. 310R) have the cruise charts broken out for various temp and PA, and all of my previous military flying included computer-based Performance Planning Cards (PPC) completed before each flight, yielding calculated cruise power settings based on actual conditions. The POH references using the "Cessna 310 Power Computer" for more precise cruise power settings, however the Google has failed to come up with hits for the Cessna Power Computer. Computer / iPad / iPhone based program would be my preferred medium. Any ideas? Thanks!