I have the Stop n Go tire plugger kit as well and a
Cycle Pump Air Compressor. I have not needed to use either of them for flat tires due to also using
Ride-On tire sealant. In more than 11 years and over 200,000 miles of riding, I have never had a flat using this stuff. I once replaced a rear tire due to wear and was told that there were 4 nails in the tire when it was replaced. The only time it did not work was when I must have picked up a very thin nail of some sort and it was not able to seal that very slow leak. As an added bonus, it also acts as tire balancer if one adds 25% more than the amount needed to seal the tire.