Taller Cell Phone Spring Loaded Tripod Mount, ninjaflex grippers and better threads for mount

I printed the cell phone spring loaded tripod mount, and found my phone is larger and thicker (extra capacity battery) than what it could hold. On top of that, my tripod has rather short threads, so I couldn't use the embedded 1/4" nut. So, I visited my local hardware store to look for options. I selected a little longer spring and a 1/4" thread insert (for wood). (spring is the same 3/8" OD, length is more like 2 3/4") Keep the spring under 2 3/4" so the spring keeps the whole assembly ti