We too have only gone up to 48', i'm not brave enough to go any higher yet + no one to delegate to !
Did u walk that length up or did u add sections as you went along?, reason i ask is i walked up 48' and it weighed a ton, bit of a bend in it also.
Have your pole sections got jubilee clips to clamp?and how do you find them, mine seem to be slowly disintegrating.
Did u have any problems with the nozzle getting stuck!!?? big problem if u do!