FINALLY - I finally got a particularly difficult 90A-PRO open
I've never really thought 90A-PROs were particularly difficult, and I'd like to apologize for underestimating the 90A-PRO.
My wife got me a five pack of cores for the 90A-PROs, and one of them was brutal. I refused to progressive pin pick it because I wanted to get it open with out any intermediary steps.
I feel, in my limited expertise, that this lock had a few spools that interacted in a way that made setting them particularly difficult...getting to a false set was something I could replicate, but once I was counter-rotating, that is where the challenges started.
For anyone out there who is struggling with a 90A-PRO, or any other lock, this was a great reminder that your (or other people's) experiences with a specific lock model do not necessarily carry over to a different core/pin mix for the same lock.
Very glad I finally got this open. It's the pick I'm most proud of in 2026 so far.