PhantomKnob Thumb Sticks (for Phantom models)

[msinger]

Amazon.com: Bestem Aerial BT-Phantom-KNOB3 PhantomKnob 'Aerial' Precision...

Amazon.com: Bestem Aerial BT-PHANTOM-KNOB11 Phantomknob Skull and Prop Precision...

Amazon.com: Bestem Aerial BT-PHANTOM-KNOB14 Precision Control Knobs (Phantomknob...

https://www.amazon.com/Bestem-BT-PHANTOM-KNOB5-PhantomKnob-Precision-Contollers/dp/B011N949TE

Product review - Phantom Knobs! Control stick accessory for your drone