I've used Banebots hubs in the past but had issues with the grub screws used to hold them on to the motor shafts. They were very small, with an equally small imperial Allen key required to tighten them, and soon after the hex holes started to round out and it became difficult to tighten them onto the shafts.

Having received some of the new T40 hubs though, the grub screw appears to have a more coarse thread and are perhaps one Allen key size larger (probably still imperial) so they should be a bit more reliable and suitable in beetleweights (so long as you can protect your wheels against horizontal impacts that could pull them off the motors).