I don´t have params yet, I don´t finish my build yet, I´m a Hobbist and work during free time periods only but I don´t have trouble to share them when finish.
My idea is to enable qassist param, and try to fly and tune the quad first so, If something go bad during transition, the quad helps not to crash and try to solve the issue. when transition looks OK, then try to do plane autotune. (I have more experience with quads than planes)
I recommend you to open a thread in Arduplane section sharing your .log and preferible a photo and video too so @tridge and other devs or advance users can see what happens to your plane and help you, I can give a look too but with less knowledge, perhaps a param you have bad config for your setup.
There is no much experience about flying wings vtol so It´s going to be usefull if you can share it and resolve your issue. Good Luck