Thank you for your feedback. I don't recall if we discussed your windows. We may have concluded that your windows are of a type better suited to an aluminium frame - usually this is where handles protrudes into the room well past the surfaces required for the magnets. Nevertheless, for readers of this note, it is still possible to successfully fit Extraglaze even on such windows. Actually our fitters use their skills to do so quite regularly, and some of our DIY customers have done the same. I think the only job we found impossible was intended for full size sliding doors (giving access to a balcony). We are always happy to advise, so please do not hesitate to call or email us so we can investigate.
