I've read a bunch of threads on here and I'm still not clear how to take a cutting from my plant. I believe it is a Philo. bipinnatifidum (see pics). I have a monsterosa and that has been very easy to propagate as the aerial comes off of an individual leaf stem, so that I cut a leaf and include the aerial and voila! This is very hard. The leaf stems on this plant do not contain the aerial. The aerial is more connected to the trunk where the stems all come from. Where exactly should I cut? I've included photographs of the whole plant (with dog photobomb), and some close ups of the trunk where the aerials and stems meet up. Thoughts? Any help appreciated.