Scooter Information
By Duncan Price
Here's my version which uses a mountaineer's prussik knot (slides when
not under tension and sticks when loaded):

so that the leash can be long:

or short:

without having to wind the excess around the handle:

- I leave both my on/off triggers working as I'm left handed and my
mate's are not, they can use my scooter as well and easily adjust the
strap underwater to length. (This idea is not original - I copied it
from Harold who was showing his tablet PC at the social).