For those that are interested, I've posted pics over on the Renault forum, on the original thread about the topic, of the pressure brake bleeder I made. The only reason for this post is that I've found it's such a good tool I want to 'share the knowledge', and the posting over there might disappear without trace...

Enables easy, very quick one man brake bleeding without pushing the master cylinder seals into a part of the cylinder that isn't normally used (meaning possible seal damage).