The "floating" spur won't cause the spur to melt if the mesh is set correctly. However a loose slipper adjustment will. All the friction from a slipper set to loose causes major friction which turns into heat, melting the spur gear. I ran a Blitz with a MMPro 5700KV combo for the whole winter indoor season and never had to replace the stock spur. In fact I have had 4 Blitz trucks and never had a spur go bad no matter what power combo I use. It all comes down to proper adjustment.