[Tristan Lall]

That hot glue technique sounds innovative, but definitely consider the heat buildup in the tread when a wheel spins in place (i.e. the wheel breaks loose before stalling the motor—generally a good thing for preserving motors). You don't want the glue to become soft and tacky as a result. Also, if you're running outdoors on asphalt, consider the ambient temperature of the surface, and the added heat due to insolation, especially in the summer. Again, you don't want a sticky mess.

Why not get in touch with AndyMark, and ask them about their durability tests on their rollers? (Andy might respond right here, if you're lucky.) See if they can estimate the wear for you, based on their tests and your usage patterns (e.g. mostly driving forward, with occasional sideways maneouvres, in moderate temperatures on asphalt, with a little bit of mileage indoors).

Another problem with soft rollers in general, and hot glue in particular, will be wheels picking up abrasive material from outdoors, and dragging it inside of buildings. You don't want tiny stones embedded in the treads, if you plan to transition from outdoors to a shiny, polished floor.