There are enough forces in this country trying to tear down GA, don't be one of them.
What I'm trying to convey is the OP is "afraid" of flying with another pilot, not because the other pilot is a bad pilot. I would also have the same concerns about any pilot Iam going to do acrobatics with, but I would talk to the subject pilot, not a third party.
I could have said it better, and not be a "prick", for that I apologize.
Seriously, stay off my lawn!
Ok, I will try to explain this more clearly. I type in quick blasts with out really thinking line by line how it could be read. Really wish I hadn't added the line about an acro endorsement.
Anyway.
Is he a good pilot? Apparently. I believe he is. Would I fly with him based on that? You bet. I let him fly my plane.
What do I know about aerobatics? Nothing.
I see a guy doing aerobatics in an ultralight all the time at my former field. Canvas, pusher, slow Ultralight.
Skip forward. Said pilot now has his cert and says "hey can I show you some aerobatics in my new toy?"
I spoke to him for about an hour listening to the sales pitch about how fun it was and how I have to go up and try it.
Now here is the rub: I have never been in the plane. I don't know how aerobatics differs in an UL versus this new plane. I can talk to him til I am out of breath about it and the sales pitch will continue which is fine. He is very excited about his new plane. I enjoy listening to him talk about it.
Now lets take my "friend" out of the equation and I will rephrase the question in a generic manner that hopefully will not have holes for you to nit-pick at.
Would you consider it safe to perform aerobatics with a low hour private pilot / High hour UL pilot that has only done them prior to this last couple weeks in the ultralight? Are the maneuvers similar enough that the difference in plane is not a concern?
Other concerns (or maybe not?) is the ink hasn't dried on the tailwheel, complex, or HP endorsements.
He is in my opinion a very good pilot based on the times I have flown with him in two, single engine, trainer type aircraft. Should those fresh endorsements be concerns or are those things not a big deal? I have none of them either so I don't know how much more complicated it makes things. Maybe not much, maybe a lot. I have no frame of reference for this.
I am afraid to fly aerobatics with him because I do not know if it is safe or not based on his credentials. If I ask him if it is safe he is not going to say "actually, no, I really shouldn't be doing this" He will say "c'mon it is a blast" I have to get an opinion that did not originate from my gut or the pilot in question one says "yes" and the other says "I'm not so sure about this"
Hopefully that is less irritating to read than my original post.
Incidentally, if there is a flaming paper bag on your porch later tonight, stomp it out. you don't want that to spread.