Meanwhile, most things are working fine. My Nexus 9 is booting and running with Xposed enabled. I have fixed the root cause of a couple of crashes which unfortunately needed much time for analysis (with the outcome that three additional lines fix it). There are a few more things I need to test, but I think you can expect a first version later this week. It should be stable enough for daily use, even though not all modules will work out of the box due to the usual amount of changes in AOSP.Also, due to popular demand, I have added a Bitcoin address to my donation page now.