yagi template: https://docs.google.com/file/d/0BzmJxxD-Z4B6WEVnUFN6V2pRMEU/edit?usp=sharing
A good Yagi calculator can be found here: http://www.changpuak.ch/electronics/yagi_uda_antenna.php
Copper foil tape: http://www.ebay.co.uk/itm/360430320375?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
The cantenna is made from a toilet brush holder. These seem to be a standard size but the dimensions are: 265mm length, 90mm diameter.
To test my antennas I use a test router 40 meters away with the signal going through three brick walls.