Does anyone know how to adjust the straps on the Maclaren Techno please?? I have the over shoulder straps at their longest setting and they were easy to adjust, but I can't seem to adjust the lab or crotch strap, although there is plenty of spare strap, but each time I try it just doesn't seem to move!!! It seems to be doubled over, a bit like an ikea high chair! But much tighter ins more confusing!! Both myself and hubby are baffled, and instruction booklet doesn't help! Help DD is squashed!! X