Improve column dragging on touch devices

Hello,

I find this plugin amazing :)
However, when I use it with an android smartphone or Tablet, the drgging of columns is quite tricky (including the official demo). I can sometimes manage to change the value of a column but its rather a random process
It seems to be improved by using a a stylus. So I think that the issue comes from the handles that are too small. I was wondering if someone had found a work around or if there was a way to thicken th handles ?

Thank you for your help