I asked on here recently about the Gruber assist, well Steve at electricmountainbikes.com, who I bought my bike from, has installed one in his new bike brand...electricgoatbikes. He is taking it to Presteigne, so hoping to get one fitted to my wife's mtb if the test ride is okay.
Heres a link to some youtube footage of his stand at the Dalby forest world championships.
YouTube - Electric Goat Bikes Presents The Forest Gluider at the UCI MTB World Cup Dalby Forest
Heres a link to some youtube footage of his stand at the Dalby forest world championships.
YouTube - Electric Goat Bikes Presents The Forest Gluider at the UCI MTB World Cup Dalby Forest