life made me do it finally. Looks like I found a very simple solution to the problem "again I didn't take that writing tablet with me". At least for me this IS a problem, with many trips and my stylus getting lost now and then :)
So, I just tryed writing characters on my HP laptop touchpad with the pointing finger of the right hand, and press or let loose the button with the left thumb (LEFT hand). After 20 min practice it felt quite natural. Like doing some manual job with both hands.