After doing the usual beginner stuff like going through the padlocks I had including a couple of lockwoods I played with the pinning on the practice lock and covered it so I couldn't see and got pretty good at single pin picking particularly after I made myself some TOK wrenches.
Last night I successfully single pin picked my lockwood 355 deadlock and felt pretty pleased with myself given I've only been doing it hands-on for a week.
But that isn't enough. I have this old corbin which is my real milestone but I need some help because honestly I don't know where to start.

The keyway (that's a bit of teflon powder above the keyway)

Basically the primary requirement is not to damage it in any way so I really need to be gentle with the keyway.
Factors making it tricky are:
The top of the keyway tapers significantly (it's not clear in the pic) and is rounded on top making wrench fitment tricky.
My southord pics cannot reach the pins from the bottom of the keyway.
My BOK tension wrenches won't stay put and risk causing damage.
The bitting is 5 pins with pin 4 being a very deep cut on the key. The rest are high cuts.
Trying to pick off the ledge on the right cannot get the pick in under the pins without pushing some of them to high.
So how would people advise tackling this lock?
BOK/TOK?
What wrenches and what picks would people look towards using when faced with this lock?
I'm up for buying what I need but don't want to buy stuff that has zero chance.
I don't rake
