hi Trevor dont really need the height in the pole has can be done from different levels but its about 60 ft all in all, it would be a knightmare to trad if not impossible has your about 2 metre a fro glass with deep ledges and only three levels to work from.
Also iv had a site survey done and they cant get access quipment to it??
so i thought there was a machine that sucked in the water has after it cleaned??so no mess.
If tha makes sense?