test day 2, the day the storm came

length: extended length just gets in the way, it just doesn't clamp enough or direct the water any more than small clips.
Weight; makes the most difference in terms of function. weight needs to be 2-4 times heavier than at the moment depending on material.

grip: it was wet and cold, and windy. more finger grip to make clamping easier. More clamping grip as with the wind some of the clips started to come loose.

after 4 hours in the storm, a couple of the clips came loose, emphasising the need for grippier clips.