Even though IFHELI posted these in another thead, I'll post them again here, because it shows robird's efforts to improve this gyro and how well it already works in Gavin's flight video:
Note: For some reason the original videos are now private. It would seem that Gavin Broadbent will no longer be promoting this gyro.
Here's some other ones I've found of Gavin flying the robird G31:
Latest, thanks SDHeliPilot: