Replaced my starter. With the on again off again operation, I thought perhaps it was my ignition switch. Early symptoms were the car would not start when hot. A few folks at the Hill Country Rallye this Spring got to see my wife pushing the car away from an Ice Cream shop in Downtown Kerville (yes, she's a keeper). More recently, it would not start at random times. I am sure I was quite the site pushing my Signal Orange 911 (fortunately a slight downhill) and jump starting it on a busy street in rush hour, or jump starting it in reverse on a ramp into our parking garage.
Anyway, slow learner that I am, I finally got the message when it wouldn't do anything. After a quick search of this site, I selected the Bosch SR68X as a replacement starter to replace the SR17X that was in there. The SR68X has a little different profile as it is smaller and lighter, but boy does it crank that engine!! I think it hit redline with just the starter. Well, perhaps not, but it cranks with a new authority and started right up. I am much relieved that I do not have to tackle the ignition switch, and look forward to driving and parking without having to worry about the parking lot slope.