Hi,
well spotted with the vent line. Ran out of T pieces and got too enthusiastic about finishing the plumbing. Incidentaly I used your pluming plan on the older version last week (as seen in my previous post) and the piece leaked air at the junction even though it was wired. This happened on start up at the flying site and was a pain because no matter what I did it just leaked. Thankfully a flying buddy had a spare one in the box which saved the day but your plumbing plan worked fine. Thanks.
Malcolm dont worry about the mix up, at my age most doors have closed behind you just a few left open for the future !
David