It will be a waste of time, good money after bad.
The good Father is not going to be there to have discussions. He will be there to repeat Menzingen's version and justifications for events and to defend the King and the King's authority.
It matters not if he is verbally bested or made to look the fool by his own accord, in the end, nothing will change.
I agree that it is a waste of time, however, if it was made easy for me to attend, I would go just to hear first hand all of the beating around the bush. And who knows, maybe a good fight may errupt, or someone could start laughing at what he says.
If it was done on Sunday after mass, and they provided food, I would go. Or maybe not if there was good weather and my son wanted to go fishing.
From another thread I wrote this, and I correct it to apply to hearing Fellay, Rostand, Phlueger La Rue etc.
I'd rather stick pins into my eyes than have to go through the TORTURE of reading Kant or any other philosopher listening to any neo-SSPX apologist priest trying to figure out things as he writes/lives (JPII, BV16, Francis). .... Maybe it is because I'm a man of action, preferring to spend my time outdoors doing physical activities, but now, knowing what I know, I think God had provided me with the gift of abhorring nonsense.
When I came back to the Church, I read more books during my first year than I had read all my previous life. I read them because they were the truth, and I knew it as I read it. Conservative Novus Ordo books like what comes out of The Rock and The Wanderer, I read like a few pages and then dropped, because they were not the same, they were not of the full truth, they were beating around the bush, not a good sign (like Bp. Fellay and any neo-SSPX apologist priest writes now). I didn't finish one of those "conservative" Catholic books.
Bottom line, maybe either you have it or you don't, the protection I had. At the very least I simply do not have the curiosity to go through the TORTURE of reading theory and nonsense. PERIOD!