It`s beneficial to cut out a 8 millimeter or so section from your
Channel,above the rounded part,then `dog-ear`.It allows for the
Moulding on upvc frames.Suitable for aluminium channels rather
Than brass or stainless.Takes about 20 minutes to make with basic
Tools.
Ian did you ever around to doing it?
Lewis Doubtfire Gleem Clean ( The Blade Runner )