I've just bought a Bad Boy 8 Ultra, with the alfine hub. When setting off at the lights in 5th gear and above i get a lag or spongy feeling on the pedals before the back cog engages with the gearing to set off. Is this normal? also when pedaling backwards in 5th and above I get a lot of noise, but next to nothing in 4th and below. Anyone have any experience of this?