A little DIY project I did today:
Got this Kershaw Shuffle clone from Ali and turned it into a no-lock friction folder, which is legal to carry almost everywhere.
Once I got the knife, I disassembled it and broke the liner with my hands by bending it a few times.
Then assembled the knife again, tightened the pivot all the way, and that's it - it works great, the friction supplies a sufficient detent to hold the blade in the open and closed positions (I'll publish a video in the comments).
It might work with other blades but I recommend:
1. Choosing a relatively cheap blade with a liner lock and a choil, so the knife could be held securely.
2. Choose a knife with nylon washers (not bronze ones and definitely not with bearings), as nylon washers will give you just the right amount of friction if you tighten the pivot all the way.
3. Choose a knife with thumb studs or a thumb hole (definitely not flippers).
Got the knife here: Shuffle Clone
Genuine Kershaw Shuffle could be bought here: Genuine Kershaw Shuffle
Or here: Kershaw Shuffle