It is interesting misinformation Steve, I inquired about Pirelli MT 60's like EdtheTraveler had installed and the Kawaker dealer said they had no tube in stock to fit.
Also have had flats in both tires, and a quick melt on patch fixed the D-Trackers right tubes up. I wasn't as lucky with the nails as you.
Before moving ran tube less mountain bike tires for several years, consisted of: a tight latex rim seal, screwed on nipple, and slime inside the rubber. Worked fantastic and could handle a whole season riding with no flats. Is there an affordable and reliable system for spoked motorcycles wheels, like the bead lock systems available for motocross?