Limiting Bending Moment in Pick Design

[Kodiak]

I'm thinking about designing a set of super slimline picks for working on locks with highly restrictive warding. To limit the bending moment in my pick, and allow for a very slim design, I would like the shank to be as short as possible.

Can anyone estimate the maximum dimension I am likely to come across between the keyway and the last pin, in say, a 7-pin pin tumbler?

I imagine I could use this as the design length of the shank for my lifter, and perhaps tack on an additional 1/8" for rakes, allowing me to bring the rake past the furthest pin.

[pepsivanilla93]

From th 5-pin locks I've seen the pin columns seem to go back about an inch. Based on that I would estimate the longest shaft you would need would probably be 1 1/4 to 1 3/4 inches. Sounds about right to me