Since you are talking about minimizing glue weight, let me point you to this paper I wrote almost 10 years ago. (scary...) Its posted on the WS event page, but is applicable to any of the light weight structures events.
https://www.soinc.org/sites/default/fil ... weight.pdf
It discusses various glues and joint execution to maximize strength. It misses Gorilla style polyurethane glues as they hadn't become a big player yet. Not sure how I'd update it to cover those as I haven't seen much use in SO. My puzzle would be how to use SMALL amounts needed for SO structures.
On pipettes, there is an alternative discussed in that article. See http://www.gryffinaero.com/models/ffpag ... yaapp.html
My implementation of this is real sophisticated. Two pins stuck through a scrap stick that come to a point. I can build a WS wing with CA and weight add under what I can measure with my scale good to 0.01 gm...