You have clearly spent time and effort on this - however looks like you need to go up a ladder ?
As Simon said - something for a gutter vac would be of interest
i have got a load of things on trial
inc things for gutter vacs it takes a long time to trial as you think you got it right and they break and you got to start again have you tried my tuff protectors
i brought out last year they took about a year to get right