Hello,
We're Gutter Cleaning Systems, I've just checked the videos on the site and they seem to be working fine now. Each video shows that particular machine working. With regards to the mirrors, believe me they work, I'm short sighted myself and I can see debris in the gutters on 3 storey buildings, we give them free with every kit so you loose nothing. The gap between the gutter and the roof tiles is not a problem we can can make you a narrow head that will fit those gutters. With regards to blocking with the new heads we're now using we've yet to have a blockage, we've done many metres of gutters with them and some of the gutters have been absolutely jam packed with leaves.
Obviously nobody can guarantee no blockages, but we feel that these new heads are a great step forward.