On March 17 my wife and I did the Ribeiro Frio slot canyon in Madeira. We went guided (Discovery Island) since we didn't want to haul all of our gear overseas just for one day of canyoneering. The water was very cold in the canyon, but it was a really good one complete with some real slot sections. We chose Ribeiro Frio because we were told it was the best slot on the island. Here are some photographs. I'll post some more later.
Madeira was a fun location for the rondy in 2013. We did Hortela Inferior, Pedra Branca and Funda (in the same day), Passo Superior, and Seixal Superior. All good canyons. Looks like you did a great one! Thanks! A pic from our trip...Calius on the 55m drop in Funda: