limoncello-mozzarella created the piece that attaches to the PSP, and Kniksis created the design of the part where your thumb goes. Bashar_blus also did something like this but the piece that attaches to the PSP isn't as good as limoncello-mozzarella's.

I have taken the surface and made it the same size as the thumbstick on limoncello-mozzarella's model, 115mm, this is because the original surface by Kniksis was meant for an extender, making it so every time you would press down on the thumbstick on Bashar's version, it would lift up because it was acting as a lever, this is why I downsized it to 115mm.

The original psp model looks like it might be 120mm but I'm not sure. If youd like me to make a 120mm version to more closely resemble the original psp version, please let me know. For now, the 115m mm model is as snug as limoncello-mozzarella's version, and it doesn't come off, atleast on my printer, it takes serious force to take it out because its a perfect fit.