by aero, do you mean TT?
I just did 38 fairly easy miles on my 'new to me' tt bike, yesterday.
with the forward position and all (still inside UCI specs) I don;t think I'd choose to do 100 on it.
76 deg ST, would need a huge setback post to get it road comfortable for me.
I think I;d be more whipped than usual after a 100.
that said, it handled a lot more comfortably than I expected and was pretty good on descents.
wheel and tire pressure, as always have a huge effect on ride.
I'll plan to ride it once a week til the coming new season, but even so it might hang for 8-10 riding days before it comes off the rack again.