I have (another) slow leak in one of my low-pro tires (21" cyclone rims). I suspect a nail, like last time. Last time this happened I took my MS to the Fremont mothership and I was told they don't plug tires, so I just bought a new tire. But that was expensive. Is there any reason to avoid taking my MS to my old "Joe Public" garage guy, who routinely plugged tires on my old ICE vehicle?