Murray, I have issues with the whole wet-versus-dry gluing technique. I find if I use wet glue, I need to clamp it for several days to get a really good bond strength. If I try to follow the dry directions I sometimes get no adhesion - I can't break through the surface film unless I clamp the joint. Because I'm concerned at the possibility of getting only a partial bond (only breaking through the dry film over part of the glued area) I wait for the surface to become very tacky, then clamp it. Results so far have been consistently good, as demonstrated by the problems I have breaking the glue joint to replace the abrasive sheets for the grinder. So, it may be that I've come to this approach because I always did a lousy job of dry gluing. However because safety is involved in my application (and to a lesser extent in yours) I currently think clamping is a considerable advantage, and well worth the additional trouble.
