If you use RTV or other liquids (I've even used body filler in a pinch), use something to center the channel on the glass untell it sets, if the channel cocks it can cause things to bind and possibly break the glass. I've seen tempered door glasses broke because of this. Thin, narrow cardboard like razor blade wrappers works good for this, a piece at each end 3/4" inch or so from the end of the channel. This also stops the glass from contacting the bottom of the channel, which can also cause problems. John
