I spent some time investigating a commercial license. Though I've got 4,000-plus hours, 2,500 multi and 1,500 turbine, all that flying has been done on a private ticket. I got out the King books and videos and I auditioned a few training outfits. I found one I liked in St. Petersburg, Florida, and arranged to get some dual instruction in their elderly Cessna 310. I tried to find out if I could use our airplane, a Cheyenne, for training, but was unsuccessful.