Hey! I'm just starting to PT, but I'm also testing in September. I would be down to go through some PTs in the 50s (though I will probably be using those as individual drill sections). My schedule is super flexible.
I think they are easier too, particularly in the 40s and 50s. I also noticed a shift in the 70s and even more so in the 80s. They may not be harder, per se, but they are definitely different.
@AshleighK I also need some more comparative practice! It just sucks that you have to randomly go through the PTs to find them. And I'm totally skipping PTs in the 40s and 50s-- just using 50s to drill.