I've got a magnetic tip trick ( i've worked out being just as annoyed as you).
I even use magnetic tip now with the Kature group 1 shot cable.
The moment you put the magnetic tip on the lens, turn it a few times clockwise, just like you would screw in the release cable.
This to magnetise the metal round completely, and to generate a bit of static, => it sticks way better that way :p
There is a way to reinforce the magnet ( called using fisics) an that's by rubbing it with a more powerfull magnet... Only problem i didn't find how to rub a more powerfull magnet in that small plug.
Any way i am thinking of making a 12V electro magnet the size of a pen to magnetise the magnet more
The focus error was quite big at 2, i have one of 1.1, that's fine for me , as i've calibrated my cloud to it..