This looks like a damn good plan to get a feel of where you are at, imo.
I actually think lately I've been doing too many singles. I don't have a meet until late October, so I probly don't need to be doing many at all, but I've done a progression of singles after 5/3/1 6-7 times in the last few months.
I skimmed over 5/3/1 for Powerlifting again, and while I like the pre-meet peaking plan, and intend to follow it, it doesn't answer the question of how high to set your goal lifts. It gives you a plan to work off the goal, but not how to figure that goal. Unless I'm an idiot and missed it haha.