any Fix for Cartgrips wrong size?

hey..
i just recieved some boxes of disposable cartgribs - but they
doest seem to woth with my Brush.
The whole in the grib is just to big. - I can see that theres included
plungerbars and the "balls" at the end i way larger that the one
on the brush, edge X etx..

anyone found a fix to make em work `?

thanks

Cut a needle bar and skrew or glue piercing balls in that size on what you need.
If i am right you just click the plunger in the brush in ?!
That should work.

Or use one of these cut the other side and skrew or glew a plastik/steel piercing ball on.
http://i65.tinypic.com/2ypg3zs.jpg

hey..
yes - thing is that the bar on the brush is too small at the end - the plungerbars included ind the grips package
does not fit the brush...

i will order some bars from swasdrive and glue some on it - only thing i can think of...

thanks guys..