Shameless plug: I simply duplicated the design from this site: https://ozo-electric.com/en/cycle-analyst/805-support-potentiometre-v3-sur-le-guidon.html

Mainly for simplicity ! There is another housing for a CA V3 potentiometer here on thingiverse: http://www.thingiverse.com/thing:1425715

It tries to mimic the vertical position from the standard poti you can get from Grin: https://www.ebikes.ca/shop/electric-bicycle-parts/ca-accessories/aux-input/ca3-aux-al.html

While the Grin version is cool with the Aluminum mount, I still find it pretty pricey at 25 U$.

Even when getting a Vishay P16 poti with 4.7 kOhm for 10€, you stay well below 15 bucks if you do it yourself. Plus you can even lower the price more by using a cheaper potentiometer.

There was another German company selling both the potentiometer as well as an aluminum bracket mimicing a similar position for the poti. Somehow they decided to stop selling this stuff.

I designed this thing with a cable hole on both sides to enable people to mount it on both sides of the handlebar. Mounting is done with two zip ties.

Over the last few weeks I have fell in love with using a potentiometer for adjusting the PAS base power level on the CA. It is both faster and more intuitive than a pair digital buttons.

Especially when going to max power shortly prior a hill or steep ramp.

I printed in PLA with 100% infill but if you need more strenght I would go at least for PETG. Be careful not to wiggle too much when you have attached your poti holder to the handlebar.

I broke mine a bit at the ziptie holes but simply "fixed" it by using black hotglue.