I will try tonight brewries are a bit funny about the tool
And yeah they have 10l kegs 20lt and 30lt the 10lt are similar to the standard kegs however the 20lt and 30lt ones are very similar to corny kegs.
They agve me a new spear and it has a safety catch that seems it may be alot easier to get out.
Instead of 2 little prongs it has one bigger one that doesnt have as much pressure on it.
I was thinking that it may be possible to grind/bend the catch a little so it could be taken out on a angle rather then straight out.
I have attached some pics of the kegs.I live in new zealand but think they may be from france.also could someone tell me what 3.5bar working pressure is in psi?