[avidiax]

What I've done is take a Kinesis Advantage2 and add an Apple Magic Trackpad, like this: [1]

I use museum wax as the mounting method, which allows slight adjustments but is otherwise a firm hold.

[1] https://www.reddit.com/r/kinesisadvantage/comments/s2n2k3/ki...

[jerezzprime]

So it's only a small movement with one of your hands for mouse control? Seems like a simple solution.