I’m not sure how securely it would fit in the ND cup holder because they are largely open sided and the type of base you are looking at usually has expanding fins which require a solid “tube” all the way round. You could always find a suitable vessel to fit inside the cup holder in which you could place the phone mount base but the inside of the holder is narrower at the bottom than the top so might require some packing. Another concern is that the cup holder mounts are not completely solid and there is some movement. This would translate to even more movement at the phone end which might be annoying when driving. I have been looking into this as well because my phone overheats just in front of the gear lever in hot sunny weather. It also depends if you need to see your screen when driving or you have Apple/Android car play (in which case it’s not necessary).