I used a ram phablet mount. It uses the clamp and fits (barely) pretty clean…Buuuut…It flew out at an undisclosed speed and ran over by a semi. Spent $1000 on a dicey data recovery to get my honeymoon pictures back. So now, I have 17lb “diamond” Velcro on mount AND use a Velcro strap to hold it in mount. 5k miles the rubber boots are worn out.
My suggestion is to get that quad lock system, only drawback is you have to use their phone case, but look bulletproof. I don’t trust my ram at all anymore.