Meccano Miscellany - The mechanical misadventures of Seattle's only Meccano fan. This site is hosted by a member of the BCMM. Check out the Schmidt Coupling video.
New Zealand Meccano.com - This site has a lot of useful and interesting information. There is also thousands of model photos in the User Gallery.
Sydney Meccano Modellers Association - This site started in late 2017 and has a members gallery and articles. Its off to a good start.
South East London Meccano Club - This page has some excellent models by Alan Wenourne regarding transmissions and gearing that include downloadable instructions and in some cases have videos as well. While on the site be sure to visit the rest of the club's various pages.