just to set the record straight

Roaming Robots and Robots Live run separate events but both cater for Heavy weight ans feathers but No spinners of either weight

Robochallenge run Feather events only and can run spinners in them

the reason for there being so few fw spinner events and arenas is cost. You need thicker poly carb which costs more and then costs more to transport takes long to put up as well.

hope this clears it up