Hi Guys, and thanks for your comments and pictures of this little oil catch tank.
I fitted one to my 2.4, and was grateful for pictures showing your installs.
Anyway, I found that mine was leaking around the outside of the threaded bush at the bottom (ie between the plastic housing and the push-in bush into which the screw is threaded). It wasn't a huge problem, and cured with a clean-up and then wrapping the bush in PTFE tape before refitting.
It seems to have stopped the leak now, and I'll just unscrew the whole plastic housing when it needs to be emptied.
Just thought I'd note my experience, hopefully not many of these units turn out to be leaky.