Dear all.

I have been working fro one year now on making 3D laser printed switch extension with different type of tactile shapes.
The idea is to have a switch top that is easy to recognize by the shape for a tactile feedback.
It has been quite difficult to come up with the right coombination of resin flextural strength and shape to obtain an sleeve type device that slides on top of the switch and stays there by clamping around it.

I have experimented different shapes and tactile feedback ( knurling, holes, pikes ).
Here is what I have come up with at the moment:

Ball long, ball short.
Engine long, engine short.
Flap long, flap short.
Gear long, gear short.



Here is an example of what it looks like. Two balls:



Ball/ flap:



Ball engine:



The lower part of the sleeve is tapered to feel like a trigger for an easy grab.



The extensions above have tiny dots on top of them.

Any suggestions on this?
What shapes would you like to see?
What tactile shape?

Thanks.