technicalities

I'm trying to make a periscope for the experimenta exhibition at black box; struggling with lenses, degrees of magnification and focal lengths; i can make one that works, but it works a little too well; it magnifies everything too much. It has to be finished on thursday.

I've been having trouble with my glue on the perspex brooches; the 5min araldite sometimes comes out a little too brittle and the pins just fall off, which sucks and causes me much embarrassment, i've been researching adhesives but they tend to be very vague in their references to "some plastics"; which ones? Araldite in the UK make a glue that would be perfect, but it doesn't seem to be available in australia. I'm going to try the 24hr araldite.