Modified my Southard today (again... I'm doing Spydercos work here )
Detent ramp added, milled the detent hole slightly larger to get a stronger detent(still not statisfied) and polished the detent track a bit
I've tried your way to drill a bigger detent hole with a diamond coated milling bit but it didn't feel right.
Usually the strength of the detent is not so much determined by how much of the ball is actually falling into the hole but by the spring tension of the lockbar.
On my Ti framlock folders with a weak detent I've disassembled the knife and put a piece of steel between lockface and pivot area to press down the lockbar just a bit more as it was before (around 1mm in my case). With the lockbar held in place I've heated the milled "relief" on the lockbar with a gas lighter until it turned red and let it cool down. After this the tension was perfect, no wrist flicking needed and I couldn't shake out the blade neither.
The only drawback is an unwanted anodization on the heated area.
The clip has the same color because it was bent from being cought in something. I've screwed it onto another piece of metal, heated it up at the bent area and bent it back when it turned red. Now it has a hardly visible wave.
These are my first attempts with acid etching and stone washing.
Ganzo 729 with acid/stonewash blade and clip.
Ganzo with wave mod and acid/stonewashed blade.
Some kind of duck commander Kershaw speedsafe knife with a masked logo,acid dipped and sonewashed.
I'm trying to muster up the nerve to do one of my Spydercos.