Review on Colby Valve Emergency Replacement Black by Jerry Mangum

I originally bought these for backup and a little insurance if and when I ever find myself in a bind. I found this pinch last weekend while driving through Adventure Offroad Park near Chattanooga. AOP, as it is commonly known, is notorious for its rocky, treacherous terrain. Just the right place to experience the capabilities of your favorite SUV worthy of your choice. I was on the infamous George Winter Trail about 40 yards away and cut off one of my TPMS stems. I used Colby's stem and continued trudging down the trail. About 40 meters further and the same wheel/tire is beaded. F^&$! He pulled out another trusty guard, a jar of test fluid, and re-dressed this child. The Colby stems have removable cores so they can be re-vented and moved up and down the trail. Ran two more days with the Colby stem and loaded up to 38lbs on Sunday to get home (not sure what max pressure, I was a bit worried about how they would hold up to the highway and speed pressures). Driven for two hours at normal highway speed (80 mph) with no problems. I can't say enough about these things. They completely saved me from having to strip and disassemble the tire/wheel on the road. Question to the admin: are they reusable. Looks like the one I used is still in good shape but I'm just curious if I should trust it again. In addition, I now want to set shorter permanent shafts. In short, so as not to cut another one in the future. Is there a specific model I should look out for?